My instinct is to start 1-2 of these in every deck, whereas in most formats that number is 0-1
Counter target spell, if it targets your commander Deliberate seems quite good in certain situations
1 Ancestral Vision Drawing cards is always good, and Ancestral Vision helps you get there after a few turns
It also combos well with any deck that cares about moving counters, as with Power Conduit, or specifically the ability to instantly win the game if you can move counters over to Darksteel Reactor
If we do, that is simply a starting point for iteration until we've either found something that works in the game or discontinue it and look for something new
Azra Smokeshaper Biting-Palm Ninja Dark Leo & Shredder Dokuchi Shadow-Walker Dokuchi Silencer Elektra, Daughter of the Hand Fallen Shinobi Foot Elite Foot Mystic Foot Ninjas Heroes in a Half Shell Ingenious Infiltrator Ink-Eyes, Servant of Oni Inkrise Infiltrator Karai, Future of the Foot Kotose, the Silent Spider Krang & Shredder Masterful Ninja Mukotai Ambusher Nashi, Moon Sage's Scion Nashi, Searcher in the Dark Nezumi Prowler Ninja Ninja of the Hand Ninja of the New Moon Okiba-Gang Shinobi Orochi Soul-Reaver Oroku Saki, Shredder Rising Overt Operative Satoru Umezawa Satoru, the Infiltrator Shark Shredder, Killer Clone Shredder, Shadow Master Shredder, Unrelenting Silent-Blade Oni Silver-Fur Master Skullsnatcher Splinter, Hamato Yoshi Splinter, Radical Rat Splinter, the Mentor Super Shredder Tatsunari, Toad Rider Throat Slitter Throatseeker Undead Hand Ninja Yuriko, the Tiger's Shadow Yuriko, the Tiger's Shadow
