The combination of seeing five cards and drawing two is surprisingly potent, especially in formats that have good ramp (Sol Ring, Ancient Tomb) and where the power level between cards varies greatly (singleton formats, Vintage)
For an ability that used to be several words long (this creature can intercept as though it had flying), its really come a long way from Rashka the Slayer (who is an Archer now, by the way)
Wall of Roots - I'm committed to Chord at this point, and Wall counts for two mana with Chord
Expend Hey, if picturesque vistas and adorable denizens guaranteed safety, we'd have time for more games, but we have to put a little work in, you know
The Jafar deck contains aligned characters like the tiger Rajah and an Agrabah guard
Black is a pretty solid combo colour in cube and so in a more combo driven format Unmask performs very well at both forcing through your own combo or disrupting other peoples