shogoki konaki, bane of DMs

trample
{4}: roll a d20, do only once per turn
1-16: tap target opponent's creature until the end of turn.
17-19: tap target opponent's creature, put a nail bomb token on it.
20: tap target creature, put a nail bomb on separate creature.
nail bomb:
when this creature next takes damage exile this token and deal 5 damage to said creature