Vadl's Mana Weave

Indestructible
You may pay any number of {e} as you cast spells. Spells you cast cost {1} less to cast for each {e} payed this way.
Lands you control have "{t}: You get {e}"
"Aether and mana are meant to flow within one another, not be used as a substitute for the other."
-- Saheeli Ria, to Nissa Revane