Cain, the Debtless

You may pay 2 life instead of {b} or {r} for any
spell you cast or to activate abilities.
You may also pay 1 life for each {c} in a spell.
Creatures you pay life for enter with a
menace counter.
If your life total would hit 0 due to casting spells
or activating abilities, your life total returns to
the starting life total.
Gain 5 infect counter and mill half of you library.