October ❖ Fighting a snake statue | His kanabo! And with it, his innate ability with weapons. When he has access to a weapon, even one he's never used before, he will find himself able to wield it skillfully. The return of the ability will be slow; it will start out only kicking in when he's actually trying to use a weapon in a life or death situation. Any attempts to use a weapon (aside from a gun, which he learned to use the old fashioned way) for practice or anything outside a life or death situation will prove unsuccessful, even if he has previously wielded it in battle.
December ❖ Monroe telling him about the regimen he echoed back | More of Nick's memory about his first meeting with Monroe; specifically, Monroe telling him about being a Weider Blutbad and the regimen he uses to stay that way. And along with that, the feeling that Monroe has been (or should have been) a Blutbad from the first time they met.
January ❖ Snake attack on the alien discussion meeting | One of the coins of Zakynthos, with none of its power and as nothing more than a shiny coin with unfortunate markings. However, along with that, he'll gain back part of his mental acuity as a Grimm - specifically, the indomitable will part that makes him resistant to most forms of mind control, hypnotism, and mental suggestion. This does not, however, make him at all drug resistant.
March ❖ Wise Snake | The 1963 Airstream Globetrotter trailer that his aunt left him when she died, along with the memory of the first time he was in it.
❖ Sparring with Anthony | The memory of being blind and having to fight anyway, using his hearing to compensate, along with the enhanced hearing that was activated in canon when he was blinded.
September ❖ Refined Shell | An upgrade for his previously echoed back trailer: the apothecary table is now stocked with its various chemicals and herbs.
❖ Seeing the cult symbol | A vial of semi-complete doppelganger potion (missing the blood component), and the knowledge of how to make it.
Tier Two Echoes