Considering all possible card types in magic at the moment (the normal card types are artifact, battle, creature, enchantment, instant, land, planeswalker, sorcery, and kindred (ex tribal)), we get the maximum hypothetical size of Tarmo equal to 9/10
If you do, put a +1/+1 counter on him
The cards first ability Good As New allows the player to exert Lucky, The 15th Puppy to reveal the top three cards of their deck, with every character card that costs two or less going into their hand and the others being put at the bottom of the deck in any order they want
If you have a sideboard, this can include up to 15 cards
The rest of the deck is filled with cards that either are creatures that modified themselves, have effects that let you modify creatures, or are spells that help modify your creatures
Magic players know whats going onwe dont need a novel