Spellsword

Invest 1 (When you cast this card from your hand
you may exile it with 1 time counter on it. At the beginning of your upkeep, remove a time counter.
When the last is removed, cast it without paying
its mana cost. It has haste.)
When Spellsword enters the battlefield return
target creature to its owners hand, if it was cast
from exile return up to 2 creatures to their
owners hands instead.