Pack Rat's ability by paying ({3} magic symbol) and discarding a card, creating a token copy of it that will enter with four +1/+1 counters on it.
Activate the
Workhorse token four times by removing four +1/+1 counters from it, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
The
Workhorse token dies as a state-based action due to having 0 toughness, triggering