Possibly part of a cycle with Glory of Elysium, Heights of Celestia, Fury of Ysgard, Hunt of the Beastlands.

First strike plus deathtouch is a very potent combination relative to other evergreen keyword combinations.

If you double down on a keyword ability, I'd choose lifelink over first strike here.

EDIT: Though on a 3/3 lifelink might also be too much, still safer than other options. You can always go with menace plus deathtouch which is offfensively much like unblockable, but far less intimidating as a blocker.

Mmm... it is very very good. Shokckingly; it seems to occur in only one place - Ankle Shanker, which is a mythic in three colours.

So maybe this is a bit more shocking than it looks. It's also really quite good for .

Originally I was thinking Menace + Deathtouch, though it's an oddly interactive combo - basically "If you block me, two creatures die". Which just sort of makes Menace that much closer to "unblockable" in practise.

I'm thinking pretty much all of these will have to cost an extra , whatever the ability combos are. You not only get 2 abilities, but Portal on top of it. So one colored and one colorless seems fair.