You can merge one of each defense building ... awarded at level one, you will get two at each of the three proceeding levels. Per the Clash of Clans February 2025 update Sneak Peek 1 thread ...

COC involves building ... level, a player can buy 500 gems for £3.99 to use toward in-app purchases. That player may then buy 500,000 gold coins at a cost of 336 gems, so the exchange rate is ...