Hel, Underworld Apprentice

{u}: Draw a card, then mill X where X is that cards Converted Mana Cost
{b}: Sacrifice a creature, then put a creature card from your hand or your graveyard onto the battlefield Tapped.
{g}: Give target creature +x/+x where Xx is equal to the number of creatures in your graveyard.
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who knew a child of Loki's would be so vicious