"Eventually I'll give retirement another shot. But not today."

Agrus Kos, Spirit of Justice

Double strike, vigilance
Whenever Agrus Kos enters or attacks, choose up to one target creature. If it's suspected, exile it. Otherwise, suspect it. (A suspected creature has menace and can't block.)

Murders at Karlov Manor

Double strike, vigilance
Whenever Agrus Kos, Spirit of Justice enters the battlefield or attacks, choose up to one target creature. If it's suspected, exile it. Otherwise, suspect it. (A suspected creature has menace and can't block.)

Double strike, vigilance
Whenever Agrus Kos, Spirit of Justice enters the battlefield or attacks, choose up to one target creature. If it's suspected, exile it. Otherwise, suspect it.

Murders at Karlov Manor Promos

If a creature is already suspected, suspecting it again won't have any effect.

Being suspected isn't a copiable value. If a permanent becomes a copy of a suspected creature, it won't be suspected.

If a suspected creature loses all abilities, it will lose menace and "This creature can't block", but it won't stop being suspected.

There's no limit to the number of creatures that can be suspected simultaneously. Suspecting a new creature doesn't cause other creatures to stop being suspected.

When an effect suspects a creature, it becomes suspected. It gains menace and "This creature can't block" for as long as it's suspected. It stays suspected until it leaves the battlefield or another effect causes it to no longer be suspected.