The only strike against Wonder is that the two best blue archetypes in OTJ draft were blue-white and blue-green, and blue-white decks tended to have mostly flying creatures to begin with, making Wonder often redundant
During your Main Phase: You can add 1 "Kashtira" Spell from your Deck to your hand
This card makes you play a careful balancing act, because if you run out of food to eat on your upkeep, or food to represent your tokens, the card becomes significantly less powerful
Those play from the top of your library cards, cards from exile, cards from the graveyard, abilities of cards on board, even cycling and ward costs are all fair game to spend this free five mana per turn on
Tetra unlocks the mighty Level 7 Synchro monsters, including Black Rose Moonlight Dragon and Clear Wing Synchro Dragon