Blood kelp

Blood Kelp enters the battlefield tapped.
{t}: add {w},{b},or {r}
{w}{b}{r},{t}: explore this biome (choose one at
random: create a 2/3 white cave crawler
creature token with deathtouch or create a red acid
mushroom artifact token with sacrifice this
artifact: acid mushroom deals one damage
to any target or each player sacrifices a
creature)