Skred

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

Incinerate

Incinerate deals 3 damage to any target. A creature dealt damage this way can't be regenerated this turn.

Pyroclasm

Pyroclasm deals 2 damage to each creature.

Varchild's War-Riders

Cumulative upkeep—Have an opponent create a 1/1 red Survivor creature token. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Trample; rampage 1 (Whenever this creature becomes blocked, it gets +1/+1 until end of turn for each creature blocking it beyond the first.)

Tendo Ice Bridge

Tendo Ice Bridge enters with a charge counter on it.
{T}: Add {C}.
{T}, Remove a charge counter from Tendo Ice Bridge: Add one mana of any color.

Stone Rain

Volcanic Hammer

Volcanic Hammer deals 3 damage to any target.

Snow-Covered Mountain

Dry Spell

Dry Spell deals 1 damage to each creature and each player.

Snow-Covered Swamp

Imperial Seal

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

Fire Ambush

Fire Ambush deals 3 damage to any target.

Sulfurous Springs

{T}: Add {C}.
{T}: Add {B} or {R}. Sulfurous Springs deals 1 damage to you.

Forbidden Orchard

{T}: Add one mana of any color.
Whenever you tap Forbidden Orchard for mana, target opponent creates a 1/1 colorless Spirit creature token.