At the beginning of each player's draw step, that player draws two additional cards.

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

Feedback Bolt deals damage to target player or planeswalker equal to the number of artifacts you control.

Indestructible {T}: Add {C}.

At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life. {T}: Add {C}. {4}, {T}, Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.

This land enters tapped. Indestructible {T}: Add {U} or {R}.

When this land enters, it deals 1 damage to target player or planeswalker. {T}: Add {C}.

{T}: Add one mana of any color in your commander's color identity.

As this artifact enters, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less to cast.

Artifact spells you cast cost {1} less to cast.