Goblin Cruciverbalist (Galaxy Foil) [Unfinity]

Haste

When Goblin Cruciverbalist enters the battlefield, create a colorless artifact token named your choice of A, E, I, O, or U.

Whenever Goblin Cruciverbalist attacks, using the first letters of names of permanents you control, spell a word you haven't spelled this game. It gets +1/+0 until end of turn for each letter in that word.