When playing Monastery of Hirana after conquering with Sett Brawler, can you use the buff that Sett gains from his triggered ability to pay for Monastery's triggered ability, or do you need to have the buff before putting Monastery's ability on the chain?

Ruling: You can order the triggered abilities so that Sett's ability resolves first, gaining the buff, which you can then use to pay for Monastery's ability. The "spend a buff" requirement in Monastery is a cost within an instruction that is paid during resolution, not when the ability is placed on the chain.

Sequence:

• Both triggered abilities go on the chain as pending items when you conquer
• You order them so Sett's ability finalizes first
• Sett's ability resolves, granting the buff
• Monastery's ability then finalizes and resolves
• During Monastery's resolution, you pay the cost (spending the buff) and draw a card

Nuances:

• Costs within instructions use templating like "[do X] to [do Y]" where [do X] is the cost
• These costs are paid during resolution, unlike additional costs (which say "as an additional cost") or activation costs (formatted as "X: Y")
• For triggered abilities with costs within instructions, you can decline to pay the cost at resolution per rule 392.2, and the ability will be removed from the chain
• The buff is considered a cost but is not a target