Does RED Darius get +2/+2 and enter ready if he is played as the third, fourth, or later card in a turn?

Ruling: No, Darius does not get the bonus if played as the third or later card. He must be played as the second card of the turn (meaning he "sees" himself as the second card played) to trigger his ability.

Nuances:

• Darius must "see" the second card being played, which includes himself being that second card
• Playing him as any card after the second (third, fourth, tenth, etc.) will not trigger the ability