Sun, Daycare Attendant

Haste First Strike Lifelink
Daybound (If a player casts no spells during their own turn, it becomes night the next turn)
When Sun enters the battlefield gain control of the target creature it gains untap it and it gains haste until end of turn
{w/b}{w/b}{p/w}{p/b},{t}: change it to day or night
{x}, {t}: destroy target creature with X converted mana cost