When CARDNAME has three or more case counters on it Whenever [condition], put a case counter on CARDNAME and [effect]
And, most importantly for our plan, it gives us another way to take advantage of forcing our opponent to discard
A Black fetchland can get any Black dual we may end up with regardless of our color combination, whether we are primarily Black or just splashing
Sac, pain and shock lands, Sulphuric Vortex, Mana Crypt, Mana Vault, Phyrexian mana, Carnophage and so on and so on
Agent Frank Horrigan Aradesh, the Founder Arcade Gannon Ayula, Queen Among Bears Butch DeLoria, Tunnel Snake Caesar, Legion's Emperor Cait, Cage Brawler Cass, Hand of Vengeance Codsworth, Handy Helper Colonel Autumn Commander Sofia Daguerre Craig Boone, Novac Guard Curie, Emergent Intelligence Desdemona, Freedom's Edge Dogmeat, Ever Loyal Dr