Aboleth

{u}, Sacrifice a target creature and regenerate
Aboleth.
{3}{u}, Discard a card: Untap a target creature and
gain control of it until the end of turn. Target
creature gains haste until the end of turn.
Aboleths are like gods, demanding worship and
obedience from their subjects. When they consume
other creatures, aboleths add the knowledge and
experiences of their prey to their eternal memories.