Abattoir Ghoul Aegar, the Freezing Flame Aegis of the Legion Agent's Toolkit Angelheart Vial Anowon, the Ruin Thief Apex Altisaur Arcbond Archangel of Thune Archangel of Thune Archon of Sun's Grace Auntie's Snitch Aurora Eidolon Axelrod Gunnarson Backfire Barbed Servitor Baron Sengir Bellowing Aegisaur Binding Agony Black Panther, Claws of Bast Black Panther, Hope Enduring Black Panther, Most Dangerous Blazing Sunsteel Blessed Sanctuary Bloated Contaminator Blood Cultist Blood Hound Bloodlord of Vaasgoth Bloodroot Apothecary Body of Knowledge Bogardan Lancer Boros Mastiff Boros Reckoner Brash Taunter Broodhatch Nantuko Bushi Tenderfoot Cacophodon Captain America, Steve Rogers Cephalid Constable Cephalid Illusionist Chandra's Incinerator Chandra's Phoenix Chandra's Spitfire Chandra, Fire of Kaladesh Changeling Hero Coalhauler Swine Contested Game Ball Crag Saurian Crossway Troublemakers Darien, King of Kjeldor Daybreak Coronet Death Pits of Rath Deep-Slumber Titan Deftblade Elite Desmond Miles Diseased Vermin Donna Noble Dread Slaver Drogskol Reaver Drogskol Reinforcements Dromad Purebred Druid's Call Estinien Varlineau Eternal Thirst Expedited Inheritance Ezio Auditore da Firenze Faithful Squire Faithful Squire Fall of Cair Andros Family's Favor Favored Hoplite Feldon, Ronom Excavator

If we wanted something to do when you played a certain color, we could have them remove a -1/-1 counter
T: Target Merfolk creature is unblockable this turn
1 Choose your commander Pick a commander whose ability points toward a clear strategy
Typically Thoughtscour effects are preferable as ways to fuel delve and delirium in cube due to being card neutral
Revolt abilities don't care why the permanent left the battlefield, who caused it to move, or where it moved to