Mirrodin Besieged

When Ichor Wellspring enters the battlefield or is put into a graveyard from the battlefield, draw a card.

When Leonin Relic-Warder enters the battlefield, you may exile target artifact or enchantment. When Leonin Relic-Warder leaves the battlefield, re...

When Treasure Mage enters the battlefield, you may search your library for an artifact card with mana value 6 or greater, reveal it, put it into yo...

Target player draws X cards. Shuffle Blue Sun's Zenith into its owner's library.

Double strike, protection from black and from green

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

({T}: Add {R}.)

({T}: Add {B}.)

Indestructible Equipped creature has indestructible. Equip {2}

Destroy target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already the...

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

{3}, {T}: Put a charge counter on Titan Forge. {T}, Remove three charge counters from Titan Forge: Create a 9/9 colorless Golem artifact creature t...

Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.

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

When Spine of Ish Sah enters the battlefield, destroy target permanent. When Spine of Ish Sah is put into a graveyard from the battlefield, return...

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

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

Concussive Bolt deals 4 damage to target player or planeswalker. Metalcraft — If you control three or more artifacts, creatures controlled by that...

({T}: Add {U}.)

Imprint — {T}: Exile target artifact card from a graveyard. Myr Welder has all activated abilities of all cards exiled with it.

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

Equipped creature gets +2/+2 and has protection from black and from green. Whenever equipped creature deals combat damage to a player, that player ...

Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.