Once per turn, when creatures with counters on them deal combat damage to a player, the player who controls Tidus can draw a card and proliferate (i.e., add an extra counter to creatures and permanents that already have them)
If you spend $199 or more, your order will include the rainbow foil Sol Ring Sweet Tooth card
Lets look at some others: Wickerbough Elder is maybe a little overcosted, but being able to put extra -1/-1 counters on it and turn them into a one-mana Naturalize should help shore us up against problematic artifacts and enchantments
At six mana, youre usually getting a hand refill with this in token decks, but leveraging that counter is where the brain starts to tick
Bucky, Squirrel Squeak Tutor Nobody's favorite character, in Disney Lorcana promo form