Countermagic : Mystic Snake, Frilled Mystic, Draining Whelk Reanimation : Karmic Guide, Phyrexian Delver, Extraction Specialist Milling : Manic Scribe, Thieves' Guild Enforcer, Sage's Row Denizen Self-Milling : Stitcher's Supplier, Satyr Wayfinder, Balustrade Spy Discard : Burglar Rat, Mesmeric Fiend, Sin Collector Goading : Insufferable Balladeer, Jeering Homunculus, Vengeful Ancestor "Gain Control" effects : Hostage Taker, Agent of Treachery, Gonti, Lord of Luxury Clones : virtually all of them, though a few are decently pricey
certainly has a more dynamic and evolving premise, but you might encounter a problem with buying the whole premise of a card game determining the worlds fate
Swords, hammers, or even Colossus Hammer turn Cloud into a fast, value-driven threat
Yazmin and Thirteen set this up nicely, one exiling cards and letting you playing them, and the other rewarding you with +1/+1 counters for doing so