Skullclamp

Equipped creature gets +1/-1.
Whenever equipped creature dies, draw two cards.
Equip

Chaos Warp

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it’s a permanent card, they put it onto the battlefield.

Lightning Greaves

Equipped creature has haste and shroud. (It can’t be the target of spells or abilities.)
Equip

Command Tower

: Add one mana of any color in your commander’s color identity.