Overlord

If {x} is less than or equal to 5 than you may return target card from your graveyard with a mana cost of {x} or lower to your hand.
If {x} is greater than 5 than you may search for
Sword of Light and Shadow in your deck or graveyard and put it into your hand.
At your end step if you gained any life this turn
you may search for a creature card with a mana
cost less than the life you gained this turn.