Artefacto legendario — Equipo
La criatura equipada tiene la habilidad de defensor y "

,

: Las otras criaturas que controlas ganan la habilidad de arrollar y obtienen +X/+X hasta el final del turno, donde X es la fuerza de esta criatura".
Equipar

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The value of X is determined as the activated ability resolves. If the equipped creature isn't on the battlefield at that time, use its power the last time it was on the battlefield to determine the value of X.
If the equipped creature's power is negative while resolving the activated ability it gains, X is considered to be 0.