eselia,water guardian cat

echo {u}(at the beginning of your upkeep
pay the echo cost or sacrifice it)
Storm (When you cast this spell, copy it
for each spell cast before it this turn)
flashback: {t} 2 blue creatures or lands
(when you pay cost return from graveyard to battlefield and lose flashback)
when you use this cards flashback
ability its echo cost becomes {u}{u}{u}
flashback triggers storm