Can Darius, Trifarian trigger his ability when played as the third card in a turn?

Ruling: Darius cannot trigger his ability when played as the third card in a turn, but he can trigger his own ability if played as the second card.

Sequence:

• Play Darius as the second card in the turn
• Darius's ability triggers because a third card can still be played after him

Nuances:

• Playing Darius as the third card does not trigger his ability since no additional card can be played after him