Boots to the Boards

When this defends, you may pay up to

. Create that many Toughness tokens.

Temper

Rulings

From the Super Slam release notes

Boots to the Boards’ ability triggers when it becomes a defending card on the combat chain. This is an optional effect: you choose to pay up to when the triggered effect resolves. You will create a number of Toughness tokens equal to the number of resources you paid.
When resolving Boots to the Boards’ triggered effect, there is no priority between any of the effects generated (e.g. paying resources, creating toughness tokens)

Keyword notes

Temper - Temper is a new keyword that exists on equipment in Crucible of War. Usually high in defense, Temper equipment presents a choice when it is down to 1{d}, of whether to defend with it one last time and see it destroyed, or save it to use for its ability.