Duda razonable (Reasonable Doubt)
Duda razonable 

Sospecha de hasta una criatura objetivo. (Una criatura sospechosa tiene la habilidad de amenaza y no puede bloquear.)
Texto de reglas (Oracle, inglés)
Suspect up to one target creature. (A suspected creature has menace and can't block.)
"Merle tenía el móvil, pero fue Blovinac a quien pillaron con el arma homicida. ¿Y quién era la persona encapuchada de dos metros? ¡Este caso es un lío!".
Legalidad
Aclaraciones de reglas (en inglés)
2024-02-02
You can't cast Reasonable Doubt just to suspect a creature. There has to be a spell on the stack that's a legal target for Reasonable Doubt.
2024-02-02
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.
2024-02-02
If a suspected creature loses all abilities, it will lose menace and "This creature can't block", but it won't stop being suspected.
2024-02-02
Being suspected isn't a copiable value. If a permanent becomes a copy of a suspected creature, it won't be suspected.
2024-02-02
If a creature is already suspected, suspecting it again won't have any effect.
2024-02-02
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.