Bloodline Amulet

If you have five or more "bloodline" card in your graveyard, you may have any number of Demonic Dominion Amulet on the battlefield.
If you control three "Loyal Demon" creatures or have four or more "Loyal Demon" creatures in your graveyard, this artifact costs {3} lands less to cast.
Loyal Demon" creatures you control cost {1} mana less to cast.
Whenever a "Loyal Demon" deals combat damage to a player, that player discards a card and you gain 2 life.
If you control four or more "Loyal Demon" creatures