Slickbeak, Arcane Kingpin

Ward—Add {u}, {r}, or {g}. Until the beginning of
your next upkeep, this mana is not lost as steps and
phases end.
Whenever you choose a mode for a spell, put a charge counter on Slickbeak, Arcane Kingpin.
Remove any number of charge counters from
Slickbeak, Arcane Kingpin: Copy target spell with mana
value X or less, where X is the number of charge
counters removed this way.