We've Seen This Before

Activated Teamwork Talent. Costs no action but always costs Strain; if its trigger comes up in the middle of combat, it also needs a Reaction Point.

When you take this Bond, agree with your partner and the GM on the specific threat, hazard or kind of creature tied to your shared past (for example: "wendigo", "the cult that hurt us both", "collapsing structures"). That is this talent's trigger from then on.

Trigger: You or your bonded partner come up against the agreed threat again.

Tier 1 (Level 1): If you're within Close range of each other, spend 1 Strain: your partner gains 1 level of Advantage on Perception, Initiative or a relevant save against the threat for the rest of the encounter or scene. You can only give this to your partner, never yourself; if you both have it, you can each spend 1 Strain to give it to the other.

Tier 2 (Level 5): As Tier 1, but your partner gains 2 levels of Advantage.

Tier 3 (Level 9): As Tier 2. You may also spend 1 more Strain to give your partner 1 level of Advantage on attacks and checks made directly against the threat, for the same time.

Tier 4 (Level 13): As Tier 3, but you may instead spend 2 more Strain to give 2 levels of Advantage on those.

Tiers

Tier 1

If you're within Close range of each other, spend 1 Strain: your partner gains 1 level of Advantage on Perception, Initiative or a relevant save against the threat for the rest of the encounter or scene. You can only give this to your partner, never yourself; if you both have it, you can each spend 1 Strain to give it to the other.

Tier 2

As Tier 1, but your partner gains 2 levels of Advantage.

Tier 3

As Tier 2. You may also spend 1 more Strain to give your partner 1 level of Advantage on attacks and checks made directly against the threat, for the same time.

Tier 4

As Tier 3, but you may instead spend 2 more Strain to give 2 levels of Advantage on those.