Sacrifice after III.) I Target creature you control fights up to one target creature an opponent controls
Should it fail to cut the competitive mustard, however, then demand will be non-existent outside of Commander
Next I would consider stuff like Shamanic Revelation, Collective Unconscious, Freyalise, Llanowar's Fury, or maybe Inspiring Call if you'll be distributing enough +1/+1 counters to creatures
In theory, you can balance out the mana loss by playing two lands on the following turn, but if Zell gets removed youll be left down a land and in a very nasty spot
He's a cheap 3-drop that can tap on the next turn to counter stuff
It has quite a history as it was a prize card that originated as part of the Tamamushi University Hyper Test campaign back in 1998