Dovin's Acuity

When this enchantment enters, you gain 2 life and draw a card.
Whenever you cast an instant spell during your main phase, you may return this enchantment to its owner's hand.

Dovin ticked the Planeswalkers off on his fingers: himself, Domri, Kaya, Ral, Vraska . . . and Bolas made an even six.