Slave Knight Gael

If at least three white mana was used to cast this
spell, Gael enters the battlefield with hexproof.
If at least three black mana was used to cast this
spell, Gael enters the battlefield with deathtouch.
The Dark Soul—If Gael would take damage,
target creature type gets -X/-X until end of turn,
where X is the amount of damage he took.