Who was the last king of the Reach before Aegon's Conquest?
Mern IX Gardener was the last king of the Reach. When the last of the Gardener's lineage died, the house went extinct and the Reach was assigned to House Tyrell to rule.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Who was the last king of the Reach before Aegon's Conquest?
### Input: 
### Response: Mern IX Gardener was the last king of the Reach. When the last of the Gardener's lineage died, the house went extinct and the Reach was assigned to House Tyrell to rule.