Not being blockable is a cheap shot. The question was which worst creature can beat the current one.
In my book this means kills it in combat (over multiple turns) or having an ability which kills it.
ramosian commander
To avoid boring infinite circles.... my opponent also does not like when I do infinite shenanigans in a game... it's like playing with yourself, boring for the other.
One warning: while playing it is possible to go infinite with moxes, hurkyls recalls, contract from below and so on. Problem is after a certain number of plays in a turn the game freezes...
Better go infinite with time walk.