Lin and Lei, Murderers

Afflict 3, flying, haste
If Lin and Lei would deal damage to a player, instead that player loses that much life.
Whenever an opponent loses life due to an effect of a source you control and wasn't dealt damage by that source, you may pay up to that much {p/u}. If you do, draw X cards, where X is the amount of {p/u} paid this way. ({p/u} can be paid with {u} or 2 life.)