When Dovin's Acuity enters the battlefield, you gain 2 life and draw a card.
Whenever you cast an instant spell during your main phase, you may return Dovin's Acuity to its owner's hand.
Dovin ticked the Planeswalkers off on his fingers: himself, Domri, Kaya, Ral, Vraska . . . and Bolas made an even six.