Dubious Vent

Dubious Vent enters the battlefield tapped.

{3}{b}{t}: Roll a d20:
1-7 | Create a tapped Treasure token.
8-14 | Create a black 2/3 Spore Lizard with deathtouch.
15-19 | Create a 5/3 Thumper with trample
20 | Create a token copy of target creature you control except it isn't legendary. put your choice of
a trample or lifelink counter on it.