Jackal, the Crazed

Whenever you discard a card you may pay {1}{u}, if you
do, draw 2 cards and lose 1 life.
{2}, {t}- choose one:
• discard a card and counter target spell unless its controller pays {3}
• sacrifice a creature and gain life equal to its toughness.
Exotic squad - (exotic squad creatures are the colours of
your commander if your commander is an exotic squad creature)