Scrying Sheets

{T}: Add {1} to your mana pool. {1}{S}, {T}: Look at the top card of your library. If that card is snow, you may reveal it and put it into your hand. ({S} can be paid with one mana from a snow permanent.)

Skred

Skred deals damage to target creature equal to the number of snow permanents you control.

Roast

Roast deals 5 damage to target creature without flying.

Pia and Kiran Nalaar

When Pia and Kiran Nalaar enters the battlefield, put two 1/1 colorless Thopter artifact creature tokens with flying onto the battlefield. {2}{R}, Sacrifice an artifact: Pia and Kiran Nalaar deals 2 damage to target creature or player.

Relic of Progenitus

{T}: Target player removes a card in his or her graveyard from the game. {1}, Remove Relic of Progenitus from the game: Remove all graveyards from the game. Draw a card.

Shatterstorm

Destroy all artifacts. They can't be regenerated.

Blood Moon

All non-basic lands are now basic mountains.

Anger of the Gods

Anger of the Gods deals 3 damage to each creature. If a creature dealt damage this way would die this turn, exile it instead.

Stormbreath Dragon

Flying, haste, protection from white {5}{R}{R}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) When Stormbreath Dragon becomes monstrous, it deals damage to each opponent equal to the number of cards in that player's hand.

Lightning Bolt

Lightning Bolt does 3 damage to one target.

Koth of the Hammer

+1: Untap target Mountain. It becomes a 4/4 red Elemental creature until end of turn. It's still a land. -2: Add {R} to your mana pool for each Mountain you control. -5: You get an emblem with "Mountains you control have '{T}: This land deals 1 damage to target creature or player.'"

Mind Stone

Eternal Scourge

Chandra, Torch of Defiance