Annoying Housefly

Enchanted player has: at the beginning of your
upkeep unless you {t} target creature you control
it gets -1/-1 until end of turn.
All players not targeted by Annoying Housefly
get a door token with:
{t} target creature to tap this token.
During your end step you may exchange
control of annoying housefly with target
untapped door token.