Guild Wars 2

Written in Stone: Maintain the passive effects of signets when you activate them.
Signet of Restoration Passive: Grants health every time you cast a spell.

After activating the signet, the Aura of Restoration buff heals less per spell and does not scale with healing power.

Tested in pvp with no other traits, no armor, empty weapon.
At 0 healing power: signet passive heals for 168 per spell. After using the signet, the buff provided by Written in Stone heals for 150 per spell.

At 798 healing power: signet passive heals for 232 per spell. After using the signet, the buff provided by Written in Stone heals for 150 per spell.