Darksteel Citadel

You may activate equip abilities any time you could cast an instant.

As long as this artifact is untapped, if a creature would deal combat damage to you, prevent 1 of that damage. 2, T: Attacking creatures get +1/+0 until end of turn.

T: Target land becomes an artifact in addition to its other types until end of turn.

T: Add CC.

Whenever this creature attacks, create a colorless Construct artifact creature token named Twin that's attacking. Its power is equal to this creature's power and its toughness is equal to this creature's toughness. Sacrifice the token at end of combat.

Destroy target artifact creature or black creature. It can't be regenerated.

Equipment named Sword of Kaldra, Shield of Kaldra, and Helm of Kaldra have indestructible. Equipped creature has indestructible. (Damage and effects that say "destroy" don't destroy it.) Equip 4

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) At the beginning of your upkeep, you may move a +1/+1 counter from target creature onto this creature. Modular 3 (This creature enters with three +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)