You can be at 10 life, pay like 3 or 4 life to get a benefit, and at your next end step, your life returns to 10 (or 20, in EDH)
It starts off as a 5/5 menace for three mana since you discard your hand on entry, then it's just a matter of keeping your hand small enough to maintain that statline
So today, in honor of Halloween, I do want to do a Top Ten article, but instead of looking at quick little Halloween Tropes that live in Magic cards, instead I want to consider cards that are great at evoking a spooky, horror-infused feeling
The Jeskai list above cut countermagic from the sixty entirely
That said, you could make a copy of Ondu Spritdancer some other way and, as long as Secret Arcade is unlocked when it enters play, the chain will start