If a WATER monster(s) is sent to the GY to activate a card or effect (except during the Damage Step): You can take 1 "Abyss-" Equip Spell from your Deck or GY and either add it to your hand or equip it to this card
It takes a lot to make a 4-mana 1/1 playable, but this one manages
So, next turn you can re-Summon your vanilla, and if it's going to die, you just toss this onto the field until you've looped all three of these into the Grave
Perhaps the best thing you can say about Tendershoot Dryad is that by itself, with no other token support cards, Saproling synergies, etc., its still a super-dangerous, must-remove threat
It means youll usually have a full army just by having Izoi enter the battlefield, and thats very hard to argue with
But, as we covered in our Amber review, I don't think a full Madrigal deck will be very competitive, so this card isn't likely to see any serious play