Mana Echoes [Onslaught]Set: Onslaught Type: Enchantment Rarity: Rare Cost: {2}{R}{R} Whenever a creature enters the battlefield, you may add an amount of {C} equal to the number of creatures you control that share a creature type with it. When the ground is saturated with mana, even the lightest footstep can bring it to the surface.

Set: Base Set Shadowless Unlimited Type: Grass Rarity: Rare Retreat cost: 0

Set: Commander 2013 Type: Sorcery Rarity: Rare Cost: {X}{R}{R} Kicker {R} (You may pay an additional {R} as you cast this spell

Set: Platinum: Rising Rivals Type: Colorless Rarity: Rare Retreat cost: 0

Set: Dissension Type: Creature — Avatar Rarity: Rare Cost: {B/R}{B/R}{B/R} ({B/R} can be paid with either {B} or {R}

Set: Onslaught Type: Creature — Bird Soldier Rarity: Rare Cost: {4}{W} Flying

Set: Fifth Dawn Type: Creature — Bringer Rarity: Rare Cost: {7}{R}{R} You may pay {W}{U}{B}{R}{G} rather than pay this spell's mana cost

"Safe passage requires only a simple answer to a simple question

Set: EX: Holon Phantoms Type: Energy Rarity: Holo Rare

Set: Jungle Unlimited Type: Fighting Rarity: Uncommon Retreat cost: Colorless

Set: Celebrations: 25th Anniversary Type: Fire Rarity: Promo Retreat cost: Colorless

Set: Sun & Moon: Guardians Rising Type: Psychic Rarity: Secret Rare Retreat cost: Colorless

Players discard cards and sacrifice creatures the same way