Infected Landwalkers

Whenever Infected Landwalkers attacks, you may sacrifice a creature. If you do, target creature you control gains "Whenever this creature attacks,
you may create a 2/2 black zombie creature
token with decayed. Then, you lose 1 life."
Whenever you lose life, copy target land you
control. That land gains "{t}, {b}: Copy target
creature you control called Infected Landwalkers
without this ability."