Calamitous Cave-In

Gates Ablaze deals X damage to each creature, where X is the number of Gates you control.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Volcanic Torrent deals X damage to each creature and planeswalker your opponents control, where X is the number of spells you've cast this turn.

Earth Tremor deals damage to target creature or planeswalker equal to the number of lands you control.

Scrapyard Salvo deals damage to target player or planeswalker equal to the number of artifact cards in your graveyard.

Eternal Flame deals X damage to target opponent or planeswalker and half X damage, rounded up, to you, where X is the number of Mountains you control.

Kicker and/or (You may pay an additional and/or as you cast this spell.)

Choose up to X creatures and/or planeswalkers you control, where X is the number of times this spell was kicked. Those permanents phase out.

Temporal Firestorm deals 5 damage to each creature and each planeswalker.