It is based on the plant in Plants vs. Zombies and Plants vs. Zombies 2 with the same name and general design, however it more closely resembles its Plants vs. Zombies 2 design.
Its Fusion ability is a reference to its ability in the two aforementioned games, while its attacking animation is based on its idle animation from Plants vs. Zombies 2.
Statistics
Class: Smarty
Tribe: Leafy Plant
Trait: Amphibious
Ability: Fusion: A Plant played on this gets Amphibious. Conjure a Leafy card.
Set - Rarity: Triassic - Rare
Card description
When Neptuna's Triassic Invasion flooded Hollow Earth with vast new oceans, Plants quickly evolved to survive.
Update history
Update 1.24.6
Added to the game.
Strategies
With
Lily Pad is largely mediocre, but still usable in less competitive circumstances.
Its issues, to outline, are largely based around its investment value not being particularly worth it. Its stats are rather poor and it cannot defend itself, but it has the upside of being a 1Amphibious plant. However, this makes it so that you need to spend at least 2 to play a plant on it, and get a random card through Conjuring that is unlikely to be very helpful to your main strategy. The final nail in the coffin for this card in competitive play is how redundant it is, existing a class where great Amphibious cards are already plentiful, so there is little need to set up for a "new" Amphibious plant for your strategy.
The only serious valid reason to consider Lily Pad is to take advantage of leafy synergy, which has very little presence in the current meta.
This card can likely survive on its own against some heroes, but classes like Crazy and Hearty have access to cards that deal pretty well with low-stat plants with Lily Pad. Beastly and Sneaky also have their own set of Amphibious cards to counter this immediately. So, you most likely would either find yourself play this on turn 1 (since you have a good chance your opponent won't be able to counter in the Zombie Tricks phase if they don't have avaliable tricks at hand), or fusing it immediately with another card upon playing.
Should you decide to use Lily Pad in your deck despite its limitations, it is noteworthy that the type of plants you would want to play on a Lily Pad in the aquatic lane are very strong ones that benefit from being on the aquatic lane; such plants generally draw immediate attention from your opponent, so playing it on the aquatic lane would be extremely advantageous in such a scenario since it is trickier to tackle Amphibious threats. To outline some non-Amphibious Smarty cards that go in this category, there are cards like Go-Nuts, Jelly Bean, and Shooting Starfruit.
There are also cards from other classes that could suit Lily Pad well, which will be outlined in this set of bulletin points.
The Mega-Grow class (Green Shadow) has access to cards that boost their own stats or utilize bonus attacks - basically its own set of powerful cards, the most notable ones being Bananasaurus Rex and Apotatosaurus. Both cards are, by design, meant to do lots of damage and each have a threatening trait, and the aquatic lane is a good fit for these plants, existing mostly unopposed to most Amphibious threats. They also both have the Dino-Roar ability, so Lily Pad's Fusion ability will give them a small boost (Apotatosaurus will gain twice the boost as it conjures another root when played). Captain Cucumber can also make the Conjured card cost less. And unless the card in question is Shamrocket, the Conjured leafy card could theoretically also work with the abilities of Typical Beanstalk and Savage Spinach.
The Kabloom class (Nightcap) has many plant cards that would work better with Lily Pad than most other classes have. Lily Pad, by design, is a card you want to Fuse with something as quickly as possible. Therefore, while this class has its own set of devastating and expensive cards that are designed to finish the game that would theoretically work well with it, the main highlight of cards for this class would be be cheaper Anti-Hero plants like Poison Ivy (or possibly Poison Oak) due to their hero-damaging capabilities. They could go largely unopposed in the water depending on your opponent's classes.
It is recommended not to play Veloci-Radish Hunter or Shroom for Two on Lily Pad since the fighters they make are not amphibious, although Pair of Pears is still viable as Pear Pal can be played on water.
The Solar class (Rose) probably doesn't work very well with this card, due to the fact the Solar class' main set of strategies mostly focus on taking control of the game than taking advantage of early-game damage. And whenever it does, it utilizes the Strikethrough trait, which is somewhat redundant to Lily Pad's advantage.
However, it would theoretically work well with cheaper sun-producing plants by giving them a lane with "aquatic" protection, but it is insignificant due to most cards just being able to harm sun-producing plants in general. And besides, it is easier and more effective to protect sun-producing plants with other Team-Up cards.
Cards like Heartichoke and Aloesaurus could theoretically also work with this well, but like with sun-producing plants, this strategy is mostly situational.
The Guardian class (Citron and Beta-Carrotina) is also another class where Lily Pad might not work very well in, due to the class already having a wealth of Amphibious cards to work with. However, cards that do good damage like Tough Beets are theoretically a good candidate to fuse with, as well as Tricarrotops and other non-AmphibiousBullseye cards to take advantage of said trait's ability. Additionally, Using Soul Patch in the aquatic lane with Lily Pad is also a good idea to prevent harm from most attackers so it takes more hits for your hero.
Against
While you can't directly counter Lily Pad's abilities, the card itself is rather defenseless ignoring its Amphibious trait. Very common and basic tricks that destroy weak plants in the Crazy and Hearty classes, like Bungee Plumber and Rolling Stone, take care of it very easily. Also, the Beastly and Sneaky classes have their own set of Amphibious defenses. Basically, deal with Lily Pad as you would with any other weak Amphibious plant.
But keep in mind that your opponent will attempt to Fuse it as fast as possible, and as such, the opponent may refrain from playing it unless they are able to fuse it in one turn, which is most likely the case, so be prepared to face unconventional aquatic threats.
It is obtained from the same set with Pumpkin Shell.
When Fusing a plant with Lily Pad, one can hear the sound Galacta-Cactus uses when activating its ability.
Its "when destroyed" animation slightly resembles one of its idle animations in its Plants vs. Zombies 2 counterpart, where it turns into a puff of bubbles.
Smarty class. It costs 1
to play and has 1
. It has the Amphibious trait, and its Fusion ability gives the plant played on it the Amphibious trait and Conjures a leafy card. Its closest zombie counterpart is Killer Whale.
Crazy and 
Hearty have access to cards that deal pretty well with low-stat plants with Lily Pad. 
Beastly and 
Sneaky also have their own set of Amphibious cards to counter this immediately. So, you most likely would either find yourself play this on turn 1 (since you have a good chance your opponent won't be able to counter in the Zombie Tricks phase if they don't have avaliable tricks at hand), or fusing it immediately with another card upon playing.
Mega-Grow class (Green Shadow) has access to cards that boost their own stats or utilize bonus attacks - basically its own set of powerful cards, the most notable ones being Bananasaurus Rex and Apotatosaurus. Both cards are, by design, meant to do lots of damage and each have a threatening trait, and the aquatic lane is a good fit for these plants, existing mostly unopposed to most Amphibious threats. They also both have the Dino-Roar ability, so Lily Pad's Fusion ability will give them a small boost (Apotatosaurus will gain twice the boost as it conjures another root when played). Captain Cucumber can also make the Conjured card cost less. And unless the card in question is Shamrocket, the Conjured leafy card could theoretically also work with the abilities of Typical Beanstalk and Savage Spinach.
Kabloom class (Nightcap) has many plant cards that would work better with Lily Pad than most other classes have. Lily Pad, by design, is a card you want to Fuse with something as quickly as possible. Therefore, while this class has its own set of devastating and expensive cards that are designed to finish the game that would theoretically work well with it, the main highlight of cards for this class would be be cheaper 
Anti-Hero plants like Poison Ivy (or possibly Poison Oak) due to their hero-damaging capabilities. They could go largely unopposed in the water depending on your opponent's classes.
Solar class (Rose) probably doesn't work very well with this card, due to the fact the Solar class' main set of strategies mostly focus on taking control of the game than taking advantage of early-game damage. And whenever it does, it utilizes the 
Strikethrough trait, which is somewhat redundant to Lily Pad's advantage.
Guardian class (Citron and Beta-Carrotina) is also another class where Lily Pad might not work very well in, due to the class already having a wealth of Amphibious cards to work with. However, cards that do good damage like Tough Beets are theoretically a good candidate to fuse with, as well as Tricarrotops and other non-Amphibious Bullseye cards to take advantage of said trait's ability. Additionally, Using Soul Patch in the aquatic lane with Lily Pad is also a good idea to prevent harm from most attackers so it takes more hits for your hero.
Double Strike trait
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Kabloom
Mega-Grow
Smarty
Solar