Sword of Once and Future

Equipped creature gets +2/+2 and has protection from blue and from black.
Whenever equipped creature deals combat damage to a player, surveil 2. Then you may cast an instant or sorcery spell with mana value 2 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.
Equip

Sword of Once and Future

Equipped creature gets +2/+2 and has protection from blue and from black.
Whenever equipped creature deals combat damage to a player, surveil 2. Then you may cast an instant or sorcery spell with mana value 2 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.
Equip

Bladecoil Serpent

When Bladecoil Serpent enters the battlefield, for each spent to cast it, draw a card.
When Bladecoil Serpent enters the battlefield, for each spent to cast it, each opponent discards a card.
When Bladecoil Serpent enters the battlefield, for each spent to cast it, it gets +1/+0 and gains trample and haste until end of turn.