Mechanized Warfare

If a red or artifact source you control would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 1 instead.

Rem Karolus, Stalwart Slayer

Flying, haste
If a spell would deal damage to you or another permanent you control, prevent that damage.
If a spell would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 1 instead.

Repercussion

Whenever a creature is dealt damage, this enchantment deals that much damage to that creature's controller.

Lightning Helix

Lightning Helix deals 3 damage to any target and you gain 3 life.