Mutant Genesis: The “M-Type Sentinel” card from the Magneto set (Mutant Genesis) has a boost ability that states: “Give…

Question

The “M-Type Sentinel” card from the Magneto set (Mutant Genesis) has a boost ability that states: “Give Magneto a Tough status card and a facedown boost card”. Generally abilities that give facedown boost cards to enemies are meant for those boost cards to be used for later activations. Meanwhile effects that are meant to give boost cards for current activations usually state to give additional boost cards to the enemy (with no “facedown” specification). But in “M-Type Sentinel’s case it is a boost ability that happens while resolving boost cards. If this boost ability was resolved during Magneto’s activation, should that “facedown” boost card be flipped during that same activation or should it be saved for a later activation? In a more general sense how are the steps for dealing with boost cards meant to be resolved? The rules state to flip boost cards one at a time, but they aren’t clear (to me) whether resolving boost abilities (which is only mentioned in the next bullet point) is something that you do after each individual flip or after all boost cards are flipped.

Answer