mtg artifact deck commander Urza, Chief Artificer Affinity Metalcraft Creatures Magic Aetherdrift Commander Deck (4) –

Kefka, Court Mage / Kefka, Ruler of Ruin Every time Kefka, Court Mage enters or attacks, it forces discards while refilling your hand with extra cards

Because the surveil mechanic puts cards into the graveyard, Lazav, the Multifarious can be played as good utility creature that also surveils when it enters the battlefield

Youre spoiled for choice when it comes to mana generators, though

At its base level it can be a land when you need it, but when youre hurting for spells, it could just refill your entire hand in the right deck

That cost can be risky, but its also what allows black decks to generate huge bursts of value and momentum