If you control an aura permanent with Sigil in its name, this costs

less to activate.
Once per Turn Instant --

:
Amp X, where X is the number of Lightning cards you've played this turn.
Commune
If you control an aura permanent with Sigil in its name, this costs

less to activate.
Once per Turn Instant --

:
Amp X, where X is the number of Lightning cards you've played this turn.
Commune