let me help you keep your stuff from dying

As an additional cost to cast this spell, pay X life. Target creature gets +X/+0 until end of turn.

As this artifact enters, choose an opponent. At the beginning of the chosen player's upkeep, this artifact deals X damage to that player, where X is the number of cards in their hand minus 4.

Whenever this creature deals combat damage to a player, return up to that many target permanents that player controls to their owner's hand.

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