Changeling As Morophon, the Boundless enters the battlefield, choose a creature type. Spells of the chosen type you cast cost {W}{U}{B}{R}{G} less to cast. This effect reduces only the amount of colored mana you pay. Other creatures you control of the chosen type get +1/+1.
Whenever a creature enters the battlefield under your control, you gain 1 life. If Answered Prayers isn't a creature, it becomes a 3/3 Angel creature with flying in addition to its other types until end of turn.
Whenever you cycle Astral Drift or cycle another card while Astral Drift is on the battlefield, you may exile target creature. If you do, return that card to the battlefield under its owner's control at the beginning of the next end step. Cycling {2}{W}
Enchant snow land you control When On Thin Ice enters the battlefield, exile target creature an opponent controls until On Thin Ice leaves the battlefield.
He cursed the wind. He cursed the cold. But by stepping on the ice, he cursed himself.
When Ranger-Captain of Eos enters the battlefield, you may search your library for a creature card with converted mana cost 1 or less, reveal it, put it into your hand, then shuffle your library. Sacrifice Ranger-Captain of Eos: Your opponents can't cast noncreature spells this turn.