Den Protector [Dragons of Tarkir Prerelease Promos] Magic Origins Prerelease Promos Volcanic Eruption deals damage to

Volcanic Eruption deals damage to each creature and each player equal to the number of Mountains put into a graveyard this way

Trample over planeswalkers (This creature can deal excess combat damage to the controller of the planeswalker it's attacking

There are rules

Set: Modern Horizons 2 Type: Instant Rarity: Common Cost: {4}{U}{U} Draw three cards

Den Protector [Dragons of Tarkir Prerelease Promos] Magic Origins Prerelease Promos Volcanic Eruption deals damage toSet: Dragons of Tarkir Prerelease Promos Type: Creature Human Warrior Rarity: Rare Cost: {1}{G} Creatures with power less than Den Protector's power can't block it. Megamorph {1}{G} (You may cast this card face down as a 2 2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1 +1 counter on it.) When Den Protector is turned face up, return target card from your graveyard to your hand.