Does Darius's trigger work if he is played as the 3rd card in a turn, or does he have to be the 1st or 2nd card played?

Ruling: Darius only triggers when your second card of the turn is played. He must either be that second card himself, or already be on the board when the second card is played. Playing him as the 3rd, 4th, or later card will not trigger his ability.

Sequence:

• If Darius is played as the 1st card, he does not trigger (no second card played yet while he's present)
• If Darius is played as the 2nd card, he triggers and comes into play ready with +2
• If Darius is already on board from a previous turn and you play your 2nd card this turn, he triggers
• If Darius is played as the 3rd or later card, he does not trigger (the 2nd card was already played before he entered)

Nuances:

• The game tracks which card is the literal 2nd card each turn (3rd, 4th, 5th, etc. are distinct)
• This is not "every time you play 2 cards" - it only happens once per turn when the 2nd card specifically is played