Mind Whisper Dagger

Equip {2}: Equipped creature gains +2/+0 and deathtouch. Ignore deathtouch canceling effects.
whenever equipped creature would deal damage
to a player, that player discards that many cards,
for every card they can't discard, they lose 1 life
and you gain 1 life.
{1}{b}: Exile a card from a graveyard. Equipped creature gains firststrike until end of turn.