Siren's Call [Limited Edition Beta] Instant add one mana of any

add one mana of any type that land produced

Blessed by the hands of Jin-Gitaxias

Even after a false god tore magic from Dominaria

but for reasons known only to the two of them neither acknowledges the other—or their strained relationship

Siren's Call [Limited Edition Beta] Instant add one mana of anySet: Limited Edition Beta Type: Instant Uncommon Cost: {U} Cast this spell only during an opponent's turn, before attackers are declared. Creatures the active player controls attack this turn if able. At the beginning of the next end step, destroy all non Wall creatures that player controls that didn't attack this turn. Ignore this effect for each creature the player didn't control continuously since the beginning of the turn.