IMO this would be very weak powerwise even if it cantripped.

It's certainly not great. Combo enabling, though.

See also Betrayal, which, yeah... it gets there with combos.

Still maybe potentially weaker than it needs to be. But it's tough to figure out how you make this better without getting crazy. Even if you just added "and gain 1 life." to the card, it becomes a two-card infinite life combo with Kor Line-Slinger/Minister of Impediments.

Can you explain during what part of the infinite combo the enchanted creature untaps?

Running a second copy of Rise to the Challenge would enable an infinite combo. There are a few infinite combos that could come up in limited which would be a problem.

No, you'd also need a Control Magic to actually go infinite, since you can't enchant your own creature with this.

So yeah; this is safe - which makes it kinda dull. But there's a few things it goes with, so it's not completely without use.

Just... 99% of decks would rather run an o-ring instead.

Oh snap, I didn't even read my own card.

Oop. Yes, I was presuming two copies of Rise to the Challenge, and failed to mention it. And yes, Rise to the Challenge can't uptap the creature it's enchanting. I failed to read your card correctly also Sorrow.

@Vitenka. Control Magic doesn't work, because the Rise to the Challenge would fall off, since this is no long a legal target to enchant.

So I guess the card isn't borken with combos after all. The closest infinite combo I could get included Patron of the Orochi and Shifting Skies... oh hold it, that doesn't work either because the Orochi has a 'once only' clause. If a player can pull infinite with this card, they deserve a trophy. I'd suggest increasing the payoff.