Mages' Contest [The List]Set: The List Type: Instant Rarity: Rare Cost: {1}{R}{R} You and target spell's controller bid life. You start the bidding with a bid of 1. In turn order, each player may top the high bid. The bidding ends if the high bid stands. The high bidder loses life equal to the high bid. If you win the bidding, counter that spell.

Set: Legends Type: Sorcery Rarity: Rare Cost: {2}{B}{B}{B} Destroy all nonblack creatures

Set: Kaladesh Inventions Type: Artifact Creature — Construct Rarity: Mythic Cost: {X}{X} Hangarback Walker enters the battlefield with X +1/+1 counters on it

Keranos isn't a creature

it gets +2/+2 until end of turn for each creature blocking it beyond the first

Whenever Balefire Dragon deals combat damage to a player

shuffle X target cards named Surging Strike

{T}: For one spell this turn

put a charge counter on Door of Destinies

Set: Diamond & Pearl: Secret Wonders Type: Fighting Rarity: Holo Rare Retreat cost: Colorless

and start thinking like a father

Hero of Akros and at least two other creatures attacked this combat

gain 1 [Life]