Most of the cards listed will stick with the counters theme, but I've also added some general goodstuff cards as well: Bloodspore Thrinax, Inexorable Tide, Anafenza, Kin-Tree Spirit, Drana, Liberator of Malakir, Renegade Krasis, Varolz, the Scar-Striped, Cytoplast Root-Kin, Dragonscale General, Ezuri, Claw of Progress, Necropolis Regent, Primeval Protector, Abzan Ascendancy Adding Counters
If needed he can create a Ninja token to protect himself or keep up the pressure, and his ultimate is unsurprisingly powerful
"Giant Cobra - Ghostly Serpent" is another Illusion card in the deck that I became quite fond of
The Aetherspark is incredible in Cloud's hands