Whether this means tapping their creatures, limiting when they can play spells/abilities, mana tax, or sacrificing permanents, all of these count as using a STAX strategy
Its also a combo piece that can potentially close games (with Mindcrank, see below)
Thanks again to Wizards for hooking us up with a sweet preview card
Traditionally, combining Eyeless Watcher with Eldrazi Displacer is the best way to go infinite with a cost-reduction effect like Zirda's, although Eyeless Watcher itself doesn't have an activated ability
You should be happy with the stats you can get with it on turn 4 and later in the game, it is not too difficult to create a 4/4 or even 6/6 Zombie
As master collectors here at Gathering Games you can find a full range of the very latest Pokemon Trading Cards