Underworld Cerberus can't be blocked except by three or more creatures.
Cards in graveyards can't be the targets of spells or abilities.
When Underworld Cerberus dies, exile it and each player returns all creature cards from their graveyard to their hand.

Constellation — Whenever Underworld Coinsmith or another enchantment enters the battlefield under your control, you gain 1 life.
, Pay 1 life: Each opponent loses 1 life.

Shuffle your library, then reveal the top card. If it's a nonland card, you may cast it without paying its mana cost. If it's a land card, you may put it onto the battlefield and return Unexpected Results to its owner's hand.

Enchant creature
Enchanted creature gets +2/+2 and has trample and lifelink. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

, Pay 1 life: Draw a card, then discard a card.

Destroy target creature. If you control an artifact, Unlicensed Disintegration deals 3 damage to that creature's controller.

Exile target creature.

Choose a card name. Search target opponent's graveyard, hand, and library for up to four cards with that name and exile them. That player shuffles their library, then draws a card for each card exiled from their hand this way.

Creatures your opponents control get -1/-0 until end of turn if was spent to cast this spell, and creatures you control get +1/+0 until end of turn if was spent to cast this spell. (Do both if was spent.)

: Target attacking Zombie gains lifelink until end of turn.
: Target attacking Zombie gains deathtouch until end of turn.

Equipped creature gets +3/+3 and has first strike.
Whenever a creature dealt damage by equipped creature this turn dies, you may exile that card. If you do, create a 2/2 black Zombie creature token.
Equip

Changeling (This card is every creature type.)
Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays .

First strike
Creatures with swampwalk can be blocked as though they didn't have swampwalk.

Draw three cards. You may play an additional land this turn.

Flying
Urborg Drake attacks each combat if able.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Uril, the Miststalker gets +2/+2 for each Aura attached to it.

When Uro enters the battlefield, sacrifice it unless it escaped.
Whenever Uro enters the battlefield or attacks, you gain 3 life and draw a card, then you may put a land card from your hand onto the battlefield.
Escape—, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Each player draws two cards, then discards three cards, then loses 4 life.

[+1]: Head to AskUrza.com and click +1.
[−1]: Head to AskUrza.com and click -1.
[−6]: Head to AskUrza.com and click -6.

Exile target nonland permanent.