Every distinct wording since 2010, newest first.
April 22, 2021 · Strixhaven
Multikicker is a variant of the kicker ability. “Multikicker [cost]” means “You may pay an additional [cost] any number of times as you cast this spell.” A multikicker cost is a kicker cost.
February 1, 2010 · Worldwake
Multiple instances of fear on the same creature are redundant.