Flora, Bonder Symbiote

Hexproof (This creature can't be the target of spells
or abilities your opponent control.)
Deathtouch
You cannot cast creatures spells with mutate,
unless you cast them as mutations. Each creature spell, if it has mutate, costs X less to cast, where
X is the number of times target creature
has mutated.
{t}Add {u}, {b} or {g} to your mana pool.