Smokestack [Urza's Saga] SWSH075 but no green thing grew

but no green thing grew there in the latter days of Saruman

Set: Conflux Type: Artifact Rarity: Rare Cost: {4} At the beginning of each player's draw step

You may reveal an Aura

Set: Double Masters Type: Artifact — Equipment Rarity: Mythic Cost: {3} Equipped creature gets +2/+2 and has protection from green and from blue

Set: Fifth Edition Type: Creature — Bird Rarity: Rare Cost: {G} Flying

Smokestack [Urza's Saga] SWSH075 but no green thing grewSet: Urza's Saga Type: Artifact Rarity: Rare Cost: {4} At the beginning of your upkeep, you may put a soot counter on Smokestack. At the beginning of each player's upkeep, that player sacrifices a permanent for each soot counter on Smokestack.