Constellation — Whenever an enchantment you control enters, put a +1/+1 counter on target creature. That creature gains flying until end of turn.
Flood the board with cheap enchantments and auras to trigger Constellation repeatedly, growing a creature (often a single threat) with +1/+1 counters and recurring evasion. You ramp into enchantments, snowball a flyer, and beat down with hexproof voltron or wide counter synergies before opponents stabilize.
Free, repeatable +1/+1 counters and evasion every time an enchantment enters
Cheap commander (GU for 3) that rebuilds threats quickly
Strong synergy with the deep Theros/enchantress card pool
Counters enable both voltron and counters-matter payoffs
Heavily commander-dependent; falls apart if Eutropia is repeatedly removed
Vulnerable to board wipes and spot removal on the buffed creature
Constellation triggers do nothing without enchantments in hand
Flying buff lasts only until end of turn, not permanent evasion