Nobody move, I thought i heard a snake

, : Target attacking creature gets +2/+0 until end of turn. When that creature leaves the battlefield this turn, sacrifice this artifact. If the creature deals damage to a creature this turn, the creature dealt damage can't be regenerated this turn. If a creature dealt damage by the targeted creature would die this turn, exile that creature instead.

Whenever this creature attacks and isn't blocked, you may have defending player activate a mana ability of each land they control and lose all unspent mana. If you do, this creature assigns no combat damage this turn and at the beginning of your next main phase this turn, you add an amount of equal to the amount of mana that player lost this way.

At the beginning of your upkeep, sacrifice a Snake. Whenever Shisato deals combat damage to a player, that player skips their next untap step.

The "legend rule" doesn't apply.

Legendary Snakes you control have shroud. (They can't be the targets of spells or abilities.) Whenever this creature deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step.