Varchild's War-Riders

Cumulative upkeep—Have an opponent create a 1/1 red Survivor creature token. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Trample; rampage 1 (Whenever this creature becomes blocked, it gets +1/+1 until end of turn for each creature blocking it beyond the first.)

Rogue Skycaptain

Flying
At the beginning of your upkeep, put a wage counter on this creature. You may pay {2} for each wage counter on it. If you don't, remove all wage counters from this creature and an opponent gains control of it.

Varchild's Crusader

{0}: This creature can't be blocked this turn except by Walls. Sacrifice this creature at the beginning of the next end step.