Doesnt cast Ugin, the Spirit Dragon, Nissas sorcery ramp spells, or Evolutionary Leap, but great at casting Whisperwood Elemental, Oblivion Sower, and Dragonlord Atarka
His ability to use stun counters on the most important blocker also means he's going to demand a lot of respect on his own, so Blue/Black mid-range strategies may find a lot of use for Kaito
Being able to regenerate multiple life per turn would indeed create a fortress-like persona before one's opponent
Throw in a Gilanra, Caller of Wirewood and Keruga, the Macrosage, then tutor up Apex Devastator
So surely, theres a midrange deck that can be mustered by adding cards like Pack Rat, Abbot of Keral Keep, and Tidehollow Sculler