Clockwork Avian [Antiquities] Archenemy Schemes at the beginning of each

at the beginning of each of your upkeeps for the rest of the game

each containing 15 MTG cards

and that player can't activate abilities that aren't mana abilities

Artifact (7)

These mighty bulwarks thwart ground-based troops

Clockwork Avian [Antiquities] Archenemy Schemes at the beginning of eachSet: Antiquities Type: Artifact Creature Bird Rarity: Rare Cost: {5} Flying Clockwork Avian enters the battlefield with four +1 +0 counters on it. At end of combat, if Clockwork Avian attacked or blocked this combat, remove a +1 +0 counter from it. {X}, {T}: Put up to X +1 +0 counters on Clockwork Avian. This ability can't cause the total number of +1 +0 counters on Clockwork Avian to be greater than four. Activate only during your upkeep.