When a unit with Skyfall of Areion and Trinity Force equipped holds at Reckoner's Arena, which effects trigger and in what order?

Ruling: When a unit equipped with both Skyfall of Areion and Trinity Force holds at Reckoner's Arena, you gain 3 points total and draw 2 cards. The hold trigger, Trinity Force's hold trigger (which becomes a conquer effect via Skyfall), and Reckoner's Arena's trigger all go on the chain simultaneously.

Sequence:

• Unit holds, gaining 1 point
• Three triggers go on the chain at the same time: the unit's hold effect, Trinity Force's hold effect, and Reckoner's Arena's trigger
• When Reckoner's Arena's trigger resolves, it activates the unit's conquer effects: Trinity Force's conquer effect (scoring 1 point) and the unit's conquer effect (drawing 1 card)
• Final result: 3 points gained (1 from hold, 2 from triggers) and 2 cards drawn

Nuances:

• Skyfall of Areion makes hold effects also count as conquer effects for the equipped unit
• Reckoner's Arena itself does not become a conquer effect due to Skyfall
• Both the Trinity Force hold trigger and the unit's own hold trigger become conquer effects that Reckoner's Arena can activate again