Leafdrake Roost

The pitch is resilience: instead of putting an evasive flyer on the battlefield where spot removal answers it cleanly, this hands a token engine to your land. Lands are about the safest hosts an Aura can pick, because dedicated land destruction is rare in most decks; the burn, combat tricks, and creature removal an opponent is actually holding can do nothing to a noncreature permanent that keeps spitting out 2/2 flyers. The token machine survives board wipes too, since the source is the enchanted land, not the bodies it makes. The cost of that durability is speed. Every Drake takes a full and a tap, so the clock builds one flyer per turn at best, and the host land is committed to producing creatures rather than tapping for the mana you would otherwise want. This is value at the Simic pace: a slow, grinding source of evasive pressure rather than a turn-three threat, and the body it produces is small enough that the appeal lives entirely in repetition and inevitability. The design sits in a quieter corner of Aura theory, where the question is not "how much can I buff a creature" but "how do I attach an ability to something that will not die." A tapland is among the cheapest insurance policies in the game, because almost no opponent has a reason to be packing an answer for it.