Vessel of Ephemera

Paying for tokens in two installments is the whole conceit here: now to bank the option, later to break the vessel for two flying Spirits. Splitting five mana across two turns lets you deploy on an idle early turn and then cash out at the precise moment two evasive bodies matter most, whether that means chump-blocking a swing, holding up creatures for convoke or crew, feeding a sacrifice engine, or padding a board the turn before an anthem lands. The enchantment also does quiet work just by sitting on the battlefield, registering as a noncreature permanent for any synergy that counts permanents before it ever produces creatures. The cost of that flexibility is information: an opponent sees the payoff coming and can hold up an answer for the turn you finally crack it, and the bodies arrive only at your pace, never fast enough to race a quick clock. As white token production goes, this is the patient, mana-hungry end of the spectrum, built less to flood a board than to keep a small burst of fliers in reserve until the turn it pays off.