Peppi and Eiji, Skygazers

Flying, protection from creatures without flying
At the beginning of each upkeep, choose up to
five colors. Until end of turn, spells of the
chosen color(s) cost {1} less to cast for each
unchosen color and spells of the unchosen
color(s) cost {1} more to cast for each color
chosen this way.
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"Together and forever we color the sky."