To upgrade your Claw Throne ruin, you need Claw Throne Shards.
With each upgrade, you need more Claw Throne Shards.
Below is a list of possible ways to gain these.
Gems
You can purchase Claw Throne Shards using gems.
1 Claw Throne Shard = 15 Gems
10 Claw Throne Shards = 125 Gems
100 Claw Throne Shards = 1,154 Gems
1000 Claw Throne Shards = 10,000 Gems
Chest
You can purchase a chest using guild coins to have a chance at
gaining extra Claw Throne Shards.
To purchase, click bag, click chests, click the third icon on right hand side.
The chest is called Magical Shard Box and costs 22,500 Guild Coins.
It randomly gives you 10 shards for any of the ruins or statues.
Campaign Elite Sweeps
You can sweet elite campaigns to pick up extra Claw Throne shards.
Elite 7-1
Elite 7-2
Elite 7-3
Elite 7-4
Elite 7-5
Elite 7-6
Chests
Chest from the VIP daily clan gifts (Bloodbite city) gives Claw Throne shards too.
VIP Daily Clan Gifts
You can collect 3 Claw Throne shards per gift from daily VIP Clan gifts (Once you have level 25 diplomacy for this city).