Healmbreakers vs. Purelances

Healmbreakers: ({2}{r}{r}): Whenever a creature you control attacks, deal 2 damage to the
defending player. Whenever a creature you control attacks, draw a card, then discard a card.
Purelances: ({2}{w}{u}): Whenever you block with a creature, gain 3 life. Creatures cannot attack you
unless its controller pays {2} for each of those creatures.
(You may cast one war on this card as a sorcery. The first effect is immediate. The second