Grindstone [Tempest] Valentines Creatures you control have "{T}:

Creatures you control have "{T}: Add one mana of any color

Set: Ravnica: Clue Edition Type: Land — Plains Island Rarity: Rare ({T}: Add {W} or {U}

and through simple combat (with players rolling dice to determine who loses units in each battle) they try to eliminate all opponents from the game board or control a certain number of "red stars"

Set: Foundations Type: Creature — Goblin Warrior Rarity: Rare Cost: {1}{R} Raid — At the beginning of your end step

you hear a noise and see a terrifying avalanche crashing down the mountain towards you

Grindstone [Tempest] Valentines Creatures you control have "{T}:Set: Tempest Type: Artifact Rare Cost: {1} {3}, {T}: Target player puts the top two cards of their library into their graveyard. If both cards share a color, repeat this process. "Memory is a burden that wears at the soul as weather wears at stone." Crovax