You can replace the extra ammo for any other card you like! But I prefer the extra ammo
For 4s after hitting an enemy with Disengage, your weapon shots deal an additional 8% of that enemy's maximum Health as damage.
Reduce the Cooldown of Disengage by 5s.
Heal for 500 after hitting an enemy with Disengage.
Reset the Cooldown of Dodge Roll after dropping to or below 45% Health.
Increase your maximum Health by 100.
Increase your maximum Ammo by 1.