A creature with Embalm can be resurrected as a Zombie: you can pay its mana cost, then the original card is exiled, and you create a Copy that retains all of that Creatures abilities
These were only released as Jumbo cards and are thus not legal in tournaments and official events
R Rare Dark Contract with Patent License X SPELL Field If your opponent Special Summons a monster(s) with the same card type (Fusion, Synchro, Xyz, or Link) as a "D/D/D" monster you control (except during the Damage Step): You can inflict 1000 damage to your opponent, also, while this card is on the field, your opponent cannot Special Summon monsters with the same card type as that Special Summoned monster for the rest of this turn
The good news is, hey, free Eldrazi
Yes, you can activate it early on by sacrificing your creature tokens, but these types of decks usually don't run cards that cost more than three to four mana