When do you select the runes to ready for Targon's Peak, and does it create a chain?

Ruling: Targon's Peak creates a delayed trigger when you conquer. You select the runes at the end of turn when the delayed trigger goes onto the chain, not when you conquer.

Sequence:

• When you conquer, the "When you conquer" trigger goes on the chain with no targets and resolves, creating a delayed trigger for end of turn
• At end of turn, the delayed trigger activates and goes onto the chain
• You choose your targets (0-2 runes) when the delayed trigger is placed on the chain at end of turn
• When it resolves, the chosen runes ready immediately

Nuances:

• This is different from Dark Child/Green Sona which explicitly trigger at end of turn as their primary trigger
• Under the new tournament rules for missed triggers, you don't need to announce the conquer trigger since it has no immediate observable impact; you only need to announce at end of turn when readying runes
• The delayed trigger behaves like any other triggered ability when it goes on the chain at end of turn