Sacred Foundry [Guilds of Ravnica]Set: Guilds of Ravnica Type: Land Mountain Plains Rarity: Rare ({T}: Add {R} or {W}.) As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped. "You will not be trained here. You will be forged." Commander Yaszen

where X is the number of lands you control

Set: EX: Delta Species Type: Lightning Rarity: Uncommon Retreat cost: Colorless

Set: EX: Battle Stadium Type: Psychic Rarity: Rare Retreat cost: Colorless

Might Type: Instant — Arcane Rarity: Uncommon Cost: {1}{R} Add {R}{R}{R}

Set: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {3} You may play lands from your graveyard

Set: HeartGold & SoulSilver: Undaunted Type: Darkness Rarity: Holo Rare Retreat cost: Colorless

Set: Magic 2014 Type: Creature — Angel Rarity: Mythic Cost: {3}{W}{W} Flying

and up to one without

The generals were dead

Her maternal instincts always take precedence—even when they conflict with the evincar's agenda—and through her numerous litters

Set: Best of Promos Type: Grass Rarity: Promo Retreat cost: Colorless

You gain 1 life for each card exiled this way