Fyendal's Spring Tunic

At the start of your turn, if this has less than 3 energy counters, you may put an energy counter on it.

Instant - Remove 3 energy counters from this: Gain

Blade Break

Rulings

From the Crucible of War release notes

You cannot activate Fynedal’s Spring Tunic during the start of the turn phase (in response to the trigger), because players do not get priority during the start of turn phase.
You must have at least 3 energy counters on Fyendal’s Spring Tunic to use it’s activated ability.
Fyendal’s Spring Tunic’s activated ability is an instant. You may activate it any time you have priority, including during an opponent’s turn, and during the reaction window of either player’s turn.
When this card is destroyed, it is sent to your graveyard.

From the Welcome to Rathe release notes

You cannot activate Fyendal’s Spring Tunic during the start of the turn phase (in response to the trigger), because players do not get priority during the start of turn phase.

Keyword notes

Bladebreak - Equipment that are fragile and break after being used to defend. If you defend with a card with Blade Break, destroy it when the combat chain closes.

When you defend with a card it remains on the combat chain until the chain closes, therefore you cannot defend with an equipment multiple times on the same combat chain.
When this card is destroyed, it is sent to your graveyard.
The ability becomes a layer on the chain when the combat chain closes.
The Blade Break ability becomes a layer on the chain when the combat chain closes.
The ability goes on the stack when the combat chain closes.

All keywords

ClassGeneric

TypeEquipment

SubtypesChest

Defense1

KeywordsBlade Break