Win the indicated number of matches with the Relics Of Doom deck to unlock the corresponding card for it.

Card	How to unlock
Demon's Horn	15
Demon's Horn	13
Eiherium Sculptor	6
Etherium Sculptor	8
Etherium Sculptor	3
Kraken's Eye	14
Kraken's Eye	12
Leonin Scmitar	4
Leonin Scmitar	2
Loxodon Warhammer	11
Mater Of Etherium	5
Platinum Angel (most powerfull card in game)	10
Razormane Manticore	7
Sharding Sphinx	9
Tidehollow Strix	1