Ever-winding clock tower

When ever-winding clock tower enters the battlefield pay {r}{r} or sacrifice it.
{t}: Add {r} or {c}{c} to your mana pool.
{3}{r}{r}{t}: Copy target spell or activated ability,
you may choose a new target for the copy. If the ability is a mode ability you may choose a
different mode for that ability.
--------------------------------------------------------------
An arcane clock with more than one purpose.