Tribal Land - Thopter
T: add B to your mana pool. Spend this mana only on activated abilities.

Creature - Human Minion (1/1, black)
When ~this~ is put into a graveyard from the battlefield, destroy all creatures. They can't be regenerated.
T: Assemble a Contraption

Converted mana cost: 1

Artifact - Equipment
Equip 1
Equipped creature can't be blocked except by Myr
3, Sacrifice a Myr: draw two cards, then discard four cards

Converted mana cost: 6