To give a concrete example, a counterspell is a strong card for defensive use, such as "stopping an opponent's win condition," but it is also a strong card for offensive use, such as "stopping interaction against your own win condition," so it can be called an aggressive interaction card
Careful inspection using these markers protects against scams and costly mistakes
If a creature an opponent controls would die, instead exile it and put a hit counter on it
With a powerful mill commander like Bruvac the Grandiloquent at the helm and a high redundancy among some of the more potent mill threats, a Commander mill deck can undoubtedly hold its own
in short, hes a deadly puzzle for your opponent to solve
Recruiter is incredibly over powered