Watcher of the Spheres

Both halves of this two-drop point forward, not down: the discount and the growth trigger only apply to flyers deployed once the Watcher is already on the board. Land it and nothing happens beyond a 2/2 flyer standing around; the payoff is entirely deferred to the winged bodies that follow. The cost reduction is the engine. Every subsequent flyer comes down for one less, so a hand that would trickle out a single threat per turn starts spilling multiple onto the table instead. The +1/+1 rider is a self-only bonus, timed to each flyer entering, which quietly means the Watcher itself balloons through a turn where you dump two or three creatures and swings for well above its printed body. It buffs no one else; the reward is concentrated on the card doing the work. That forward-looking dependency is also the weakness: a fragile 2/2 that has to stick around to matter, answering nothing that already happened. It belongs to a lineage of Azorius flyers rewards built around committing fully to the air, floating a board over an opponent whose defenses stay grounded. Less a build-around than a signpost for the winged aggro plan, marking the deck it wants to be in without demanding you construct one from scratch.