If you're like me, you thought of things like Primeval Titan, Gurmag Angler, Arclight Phoenix, Griselbrand, Jace, the Mind Sculptor, Bloodbraid Elf, Teferi, Hero of Dominaria, Kalitas, Traitor of Ghet
I guess this plan is better than doing M25, M26, M27
Footsteps of the Goryo There are plenty of creatures that can change the course of a game just by hitting the battlefield
Tidus, Yuna's Guardian I get a little bummed that Tidus, Yuna's Guardian is stuck working with only creatures, but the ability to move counters and proliferate is very good
Ive also left in a couple of the biggest haymakers from the original list you cant reanimate Kefka or Umaro with Terra directly, but she can bring back a card like Priest of Fell Rites to do it for you
As far as a 99 inclusion, Kastrals likeliest home is a Bant shell including Tawnos, the Toymaker and Birds of Paradise could be part of the same flock