Jackknight [Unstable] Aura Curse "A system to direct the

"A system to direct the flow of Ravnica's entire water supply

Set: Commander 2018 Type: Artifact Rarity: Rare Cost: {5} At the beginning of each player's precombat main phase

Set: Mercadian Masques Type: Enchantment Rarity: Rare Cost: {2}{G} Exile a creature you control: Add X mana of any one color

Night after night

Jackknight [Unstable] Aura Curse "A system to direct theSet: Unstable Type: Artifact Creature Cyborg Knight Rarity: Rare Cost: {1}{W} Whenever another artifact enters the battlefield under your control, put a +1 +1 counter on Jackknight. If that artifact is a Contraption, Jackknight gains lifelink until end of turn. "My sword is at your service, as are my scissors, corkscrew, and bottle opener."