I want to make a deck where you do damage to yourself to do damage to your opponent. The only card that does this that I've found is Sower of Discord. I would like to know if there are other cards like this.
Maybe Bond of Agony (Note, that you have to pay X mana and a black as well as X life for the spell)
You can also run the many deal damage to all players cards, like red's Inferno or green's Claws of Wirewood. Black can drain all players while gaining you life, for example with Blood Tithe. The extort mechanic does this as well.
edit:
You can also use something like Axis of Mortality or Magus of the Mirror in conjunction with Blood Celebrant or Adanto Vanguard to lower your life total to right above 0, then exchange life totals with your opponent. Risky, because they can just Bolt you when you are low on life, and you also have to still somehow deal the finishing blow after that stunt.
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You can also run the many deal damage to all players cards, like red's Inferno or green's Claws of Wirewood. Black can drain all players while gaining you life, for example with Blood Tithe. The extort mechanic does this as well.
And then there is Aetherflux Reservoir.
edit:
You can also use something like Axis of Mortality or Magus of the Mirror in conjunction with Blood Celebrant or Adanto Vanguard to lower your life total to right above 0, then exchange life totals with your opponent. Risky, because they can just Bolt you when you are low on life, and you also have to still somehow deal the finishing blow after that stunt.
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