Doombot Harbinger

For each player, you choose from among the permanents that player controls an artifact, a creature, an enchantment, and a planeswalker. Then each player sacrifices all other nonland permanents they control.

This land enters tapped unless you control a Swamp or a Mountain. T: Add B or R.

Lands you control have "T: Add one mana of any color." T: Add one mana of any color.

Affinity for artifacts (This spell costs 1 less to cast for each artifact you control.) Reach, trample

Draw X cards. If X is 5 or more, you may cast a Hero spell from your hand without paying its mana cost.

Flying (This creature can't be blocked except by creatures with flying or reach.) When The Wasp enters, she deals 4 damage to target tapped creature an opponent controls.

This land enters tapped unless you have two or more opponents. T: Add G or U.

Whenever Hammer of Nazahn or another Equipment you control enters, you may attach that Equipment to target creature you control. Equipped creature gets +2/+0 and has indestructible. Equip 4