Emerge represents two static abilities that function while the spell with emerge is on the stack. “Emerge [cost]” means “You may cast this spell by paying [cost] and sacrificing a creature rather than paying its mana cost” and “If you chose to pay this spell’s emerge cost, its total cost is reduced by an amount of generic mana equal to the sacrificed creature’s mana value.” Casting a spell using its emerge ability follows the rules for paying alternative costs in rules 601.2b and 601.2f–h.
May 3, 2019 · War of the Spark
Escalate is a static ability of modal spells (see rule 700.2) that functions while the spell with escalate is on the stack. “Escalate [cost]” means “For each mode you choose beyond the first as you cast this spell, you pay an additional [cost].” Paying a spell’s escalate cost follows the rules for paying additional costs in rules 601.2f–h.
January 25, 2019 · Ravnica Allegiance
Escalate is a static ability of modal spells (see rule 700.2) that functions while the spell with escalate is on the stack. "Escalate [cost]" means "For each mode you choose beyond the first as you cast this spell, you pay an additional [cost]." Paying a spell's escalate cost follows the rules for paying additional costs in rules 601.2f-h.
July 22, 2016 · Eldritch Moon
Escalate is a static ability of modal spells (see rule 700.2) that functions while the spell with escalate is on the stack. “Escalate [cost]” means “For each mode you choose beyond the first as you cast this spell, you pay an additional [cost].” Paying a spell’s escalate cost follows the rules for paying additional costs in rules 601.2f–h.