[RPG] Can a creature use an immediate reaction after another creature’s opportunity action on a third creature’s turn

battleminddnd-4eimmediate-reactionmarkopportunity-actions

My battlemind and a cleric were engaged in a melee battle with a Deathdog the other day. The cleric was knocked down on a previous turn, so that when her turn began she attempted to stand up. The deathdog, who was marked by the battlemind, responded with it's opportunity action:

Go for the Legs (opportunity , when an
adjacent enemy stands up; at-will) *
Necrotic

The deathdog makes a pouncing bite
attack against the triggering
creature; 1d10 + 4

Knocking the cleric down and dealing damage.

Mind Spike
At-Will + Force, Psionic, Psychic
Immediate Reaction Melee 1
Trigger: An adjacent enemy marked by you deals
damage to your ally with an attack
that doesn't include you as a target
Target: The triggering enemy
Effect: The target takes force and psychic
damage equal to the damage that its
attack dealt to your ally.

Can my Battlemind then use Mind Spike on the Deathdog?

Best Answer

Yes,

An Immediate action can be used once between your turns. As long as it isn't your turn, your Immediate Action can be used whenever its trigger condition is met.

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