At common, we have Ephemerate and Settle Beyond Reality as straightforward ways to blink your creatures for value
Goblin Champion Goblin Champion had its place in Modern Horizons Limited decks, but youre not missing out on much unless youre building a goblin Commander deck out of Draft chaff and bulk commons
This type of larger deck size requirement is a very interesting mechanic in my opinion to shake up the design space a bit, posing a consistency/slightly worse card pool vs one extra card trade off
Lightning, Army of One (Borderless) 4
Fortunately, Emrakul is banned in Commander, but it can still terrorize the Modern and Legacy formats.
It needs less bodies to win with since you only need to deal 10 total damage to your opponent to kill them, and in multiplayer you just need 10 per person, very possible in one turn