Cloudstone Curio [Kaladesh Inventions] Commander 2018 put a -1/-1 counter on

put a -1/-1 counter on each creature your opponents control

Whenever Treva

As long as a card exiled with Duplicant is a creature card

Set: Aether Revolt Prerelease Promos Type: Instant Rarity: Rare Cost: {1}{U}{U} Counter target spell

Set: Happy Holidays Type: Creature — Ooze Rarity: Rare Cost: {2}{R}{G} At the beginning of your upkeep

Cloudstone Curio [Kaladesh Inventions] Commander 2018 put a -1/-1 counter onSet: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {3} Whenever a nonartifact permanent enters the battlefield under your control, you may return another permanent you control that shares a permanent type with it to its owner's hand. With innovative stabilizing techniques, Suja Pavani brings this piece of the sky itself to the Inventors' Fair.