When Possession is played as the second card of the turn targeting Darius Trifarian, does Darius see it as the second card played and trigger his ability, or does he fail to see it because he was under opponent's control when Possession started resolving?

Ruling: Darius will see Possession as the second card played and trigger his ability. Darius is under your control when Possession becomes fully resolved/played, which is when it counts as "your second card played this turn."

Sequence:

• Possession targets Darius while he's under opponent's control
• Possession resolves and recalls Darius to your base
• Possession becomes fully resolved/played (enters trash)
• Darius is now on your board and sees Possession as your second card played
• Darius's ability triggers

Nuances:

• Darius has "super vision" - he retroactively tracks all cards his current controller has played this turn, even cards played before he entered the board
• Darius tracks his controller's cards specifically (the "you" in his text)
• If you play Darius as your 3rd card, the next card won't ready him because it's the 4th card that turn
• The count of cards played is a constant state that Darius checks, not dependent on when he entered play