Conjuro
Elige una criatura objetivo que controla un oponente y luego tira 1d20.
1—9 | Regrésala a la mano de su propietario.
10—19 | Su propietario la pone en la parte superior o en el fondo de su biblioteca.
20 | Gana su control hasta el final de tu próximo turno.
An effect that says “choose a target, then roll a d20” or similar still uses the normal process of putting an ability on the stack and resolving it. Choosing targets is part of putting the ability on the stack and rolling the d20 happens later, as the ability resolves.