Patriar's Seal

{T}: Add one mana of any color.
{1}, {T}: Untap target legendary creature you control.

Magnetic Mine

Whenever another artifact is put into a graveyard from the battlefield, this artifact deals 2 damage to that artifact's controller.

First strike
{T}: Destroy target artifact if its mana value is equal to the amount of unspent mana you have.

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

{T}: Add {C}.
{T}: Target nonland permanent becomes an artifact in addition to its other types until end of turn.

Whenever an artifact is put into an opponent's graveyard from the battlefield, you may draw a card.

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