Rubi Lenira - Crimson Mage

Haste, Double strike
{2}{p/r}: You may cast an Instant or Sorcery spell
from your hand without paying its mana cost.
Activate this ability only when you cast an
Instant or Sorcery spell. The converted mana
cost of the spell cast with this ability must be
equal to or lower than the converted mana cost
of the spell used to trigger this ability.