Tarkir: Dragonstorm

Craterhoof Behemoth | Creature | Beast | Haste When this creature enters, creatures you control gain trample and get +X/+X until end of turn, where X is the number of creatures you control. | Magali Villeneuve

Death Begets Life | Sorcery | | Destroy all creatures and enchantments. Draw a card for each permanent destroyed this way. | Justin Hernandez & Alexis Hernandez

Ureni, the Song Unending | Legendary Creature | Spirit Dragon | Flying, protection from white and from black When Ureni enters, it deals X damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control, where X is the number of lands you control. | Alexander Ostrowski