Walking Ballista [Aether Revolt] Desert {T}: Exchange target opponent's life

{T}: Exchange target opponent's life total with Tree of Perdition's toughness

Set: Revised Edition Type: Sorcery Rarity: Rare Cost: {X}{B} Target player discards X cards at random

You don't put a legendary permanent into a graveyard if you control two with the same name

Set: Dissension Type: Artifact Creature — Construct Rarity: Rare Cost: {4} When a player other than Bronze Bombshell's owner controls it

if you control seven or more lands

Walking Ballista [Aether Revolt] Desert {T}: Exchange target opponent's lifeSet: Aether Revolt Type: Artifact Creature Construct Rarity: Rare Cost: {X}{X} Walking Ballista enters the battlefield with X +1 +1 counters on it. {4}: Put a +1 +1 counter on Walking Ballista. Remove a +1 +1 counter from Walking Ballista: It deals 1 damage to any target.