Does choosing a unit/gear in the opponent's hand with Mindsplitter count as progress towards Ezreal's Prodigal Explorer ability (which requires targeting 2 gears/units in the same turn)?

Ruling: No, Mindsplitter does not count towards Prodigal Explorer's requirement. Mindsplitter only targets a player, not units or gear. The card chosen from hand is selected during resolution and is not a target.

Nuances:

• Effects that use "choose" during resolution are distinct from "targeting" effects
• Cards in hand are not considered proper units; they are only units when on the board (they are "unit cards" in hand)