Walking Ballista [Double Masters] World Championship Decks 2004 you may sacrifice another creature

you may sacrifice another creature

if you control the artifact with the highest mana value or tied for the highest mana value

Set: Dominaria Type: Legendary Artifact Rarity: Mythic Cost: {0} {T}: Add one mana of any color among legendary creatures and planeswalkers you control

Set: Unlimited Edition Type: Instant Rarity: Rare Cost: {B}{B} Look at target opponent's hand and choose a card from it

Set: Shadows over Innistrad Prerelease Promos Type: Creature — Zombie Rarity: Mythic Cost: {B}{B} Menace (This creature can't be blocked except by two or more creatures

Walking Ballista [Double Masters] World Championship Decks 2004 you may sacrifice another creatureSet: Double Masters 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.