May need to swap this card's size with Axewatch Recluse to achieve a better spacing of sizes+costs in each rarity.

Woah. ... Scary creature. A serious clock.

Hmm, yeah, it might be a bit too hard to kill. It's expensive to keep activating, but if you have this on the table, you might not need to be casting many more spells. I'll consider shrinking it.

I could treat this as something like a Canyon Minotaur with ": ~ is unblockable this turn". Which is pretty good, although not broken.

I remember playing with this in one of the theme decks, although they were not very well tuned at that point. It seemed good but not broken, but I don't know if that would be representative out of that deck.

My first reaction is that vigilance AND unblockability has to be too good. But on reflection, it's comparable to Serra Angel: the size and CMC is reduced slightly, toughness increased, but can't block fliers, red not white, but can only attack if you pay a cost (although the cost is at the end of your opponent's turn which is the least inconvenient place for it). And Serra Angel is good but by no means broken.

So I guess the question is, how often is Serra Angel ever blocked? I'm guess that that's actually quite rare: if the opponent has four power of fliers, no kill spell, and doesn't want to race. So this definitely needs testing (and I wouldn't be surprised if it shrank a point), but it's at least plausible.