Primeval Spawn
Creature — Avatar
Vigilance, trample, lifelink
When this creature leaves the battlefield, exile the top ten cards of your library. You may cast any number of spells with total mana value 10 or less from among them without paying their mana costs.
Legal in
Legacy, Vintage, Commander
Rulings (10)
If the spell has in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
2022-09-09
If an effect from a static ability would remove all abilities from Primeval Spawn if it were on the battlefield (such as that of Humility), then its first ability won’t cause it to be exiled. It will enter the battlefield as normal.
2022-09-09
If an effect causes a card to enter the battlefield as a copy of Primeval Spawn and that permanent wasn’t cast or no mana was spent to cast it, that card will be exiled instead of entering the battlefield.
2022-09-09
Primeval Spawn’s last ability checks the mana values and types of the spells on the stack, not the mana values and types of the cards in exile. Notably, this means that you may cast the back face of a modal double-faced card or either face of a split card as long as the spells you are casting together have a total mana value of 10 or less.
2022-09-09