That means you can copy Explosive Vortex from the new Charizard ex [Pokemon 151] to OHKO your opponents Pokemon before they get a chance to OHKO you
I put in Blood Artist, Dictate of Erebos, Rage Thrower, Falkenrath Noble and took out Thorn Elemental, Hunting Grounds, The Gitrog Monster, Firemane Avenger, and Loxodon Gatekeeper
Not only does this really slow down your opponent but it costs them a draw which very punishing early against tempo based decks
Theoden, King of the Golden Hall (5C93) Wiki General Strategy This page needs some work
Still, even without changes, I had a great time with Eternal Might
Like Delver of Secrets, Vendilion Clique is good in traditional control decks as well as the more tempo-based brews