Akio
Lord of Naptime
Offer Blackfyre, sword of Aegon the conquer, the entire thing his house is named for and the greatest weapon of house Targaryen, so Tiber has to declare himself publically the enemy of every other faction to take it? Technically he's offering what Tiber could take to. Viserys took no bread and salt and met Tiber with a sword on his lap.