Character unlock question

Hello everyone, I’ve managed to get 50 character shards for Helix. If I were to press the upper button, does it use shards instead?

Also, is he even any good to unlock with 3000 gems?

Thank you!

Hello everyone, I’ve managed to get 50 character shards for Helix. If I were to press the upper button, does it use shards instead?

Also, is he even any good to unlock with 3000 gems?

Thank you!