Shadow dragon

At the beginning of your upkeep, you may put a charge counter on this artifact.

{T}: You may put a creature card with mana value equal to the number of charge counters on this artifact from your hand onto the battlefield.

As this enchantment enters, choose odd or even. (Zero is even.)

Each creature with mana value of the chosen quality has haste.

Each creature without mana value of the chosen quality enters tapped.

({T}: Add {B} or {R}.)

As this land enters, you may pay 2 life. If you don't, it enters tapped.

You may reveal this card from your opening hand. If you do, at the beginning of the first upkeep, create a 1/1 red Phyrexian Goblin creature token with haste.

When this creature enters, create X 1/1 red Phyrexian Goblin creature tokens with haste, where X is the number of creatures you control.

If this creature hasn't been exerted this turn, you may exert it as it attacks. When you do, untap all other creatures you control and after this phase, there is an additional combat phase. (An exerted creature won't untap during your next untap step.)

Trample

This creature enters with X +1/+1 counters on it, where X is the total life lost by your opponents this turn.

This creature gets -X/-X, where X is your life total.

As an additional cost to cast this spell, sacrifice a creature.

Search your library for a card, put that card into your hand, then shuffle.

As an additional cost to cast this spell, sacrifice a creature.

Fling deals damage equal to the sacrificed creature's power to any target.

({R/P} can be paid with either {R} or 2 life.)

Flying

{R/P}: This creature gets +1/+0 until end of turn.

({T}: Add {R}.)

When this creature enters, add {R}{R}{R}.

({T}: Add {B}.)