Mirrodin Besieged

Casting Cost:

Trample, infect, indestructible

If Blightsteel Colossus would be put into a graveyard from anywhere, reveal Blightsteel Colossus and shuffle it into its owner's library instead.

Casting Cost:

First strike, deathtouch

Whenever a creature an opponent controls dies, you may return target artifact card from your graveyard to your hand.

Casting Cost:

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

Whenever Hero of Bladehold attacks, put two 1/1 white Soldier creature tokens onto the battlefield tapped and attacking.

: Add  to your mana pool.

: Inkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying and infect until end of turn. It's still a land. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Casting Cost:

When Massacre Wurm enters the battlefield, creatures your opponents control get -2/-2 until end of turn.

Whenever a creature an opponent controls dies, that player loses 2 life.

Casting Cost:

First strike, protection from red and from white

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Casting Cost:

Equipped creature gets +2/+2 and has protection from black and from green.

Whenever equipped creature deals combat damage to a player, that player discards a card and you untap all lands you control.

Equip 

Casting Cost:

+1: Look at the top five cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

-1: Target artifact becomes an artifact creature with base power and toughness 5/5.

-4: Target player loses X life and you gain X life, where X is twice the number of artifacts you control.

Casting Cost:

Thrun, the Last Troll can't be countered.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

: Regenerate Thrun.