Merfolk

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Eldrazi Spawn

Decayed (This creature can't block. When it attacks, sacrifice it at end of combat.)

{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.

{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery.

At the beginning of your end step, draw a card.
Whenever a creature deals combat damage to you, its controller becomes the monarch.

{2}, {T}, Sacrifice this artifact: You gain 3 life.

{2}, Sacrifice this artifact: Draw a card.

{T}, Sacrifice this artifact: Add one mana of any color.