When Aurora triggers and finds a unit, and Karma triggers on the recycle, can Karma buff the unit that was played from Aurora?

Ruling: Yes, Karma can target the unit played from Aurora. The unit is played first (goes onto chain pending), then the recycle happens (Karma triggers onto chain pending above the unit). When finalizing, the unit finalizes and resolves first because permanents cannot have finalized items above them on the chain. After the unit resolves and enters play, Karma finalizes and can choose the unit as a target.

Sequence:

• Unit goes onto chain pending
• Recycle happens, Karma triggers onto chain pending above the unit
• Aurora finishes resolving, game returns to finalize
• Unit finalizes first and immediately resolves (enters play)
• Unit entering play causes cleanup, which finalizes pending Karma
• Karma finalizes and can now target the unit that just entered play
• Karma resolves

Nuances:

• You cannot choose the order of the unit play and Karma trigger - they happen in the order written on Aurora's text
• Permanents on the chain have special rules: they finalize FIFO (first in, first out) but resolve immediately when finalized, before other pending items above them
• If the unit has a "when you play me" trigger, it would trigger after the unit enters play during the cleanup, get added as pending, finalize together with Karma, but resolve before Karma