Rift Sower (Modern Horizons 2)

Creature Ñ Elf Druid - {T}: Add one mana of any color.
Suspend 2Ñ{G} (Rather than cast this card from your hand, you may pay {G} and exile it with two time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)