Blackwing - Gofu the Vague Shadow - Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) while you control no monsters. When this card is Special Summoned from the hand: You can Special Summon 2 "Vague Shadow Tokens" (Winged Beast-Type/DARK/Level 1/ATK 0/DEF 0), but they cannot be Tributed or be used as Synchro Material. You can banish this card and 1 or more face-up non-Tuners you control, then target 1 "Blackwing" Synchro Monster in your Graveyard whose Level equals the total Levels the banished monsters had on the field; Special Summon it, and if you do, it is treated as a Tuner.
You can use tokens for a fusion summon. Since the tokens don't have an effect they are treated as normal monsters. This card doesn't restrict you from using those tokens as fusion material. None of the Metalfoes fusions have a restriction relevant to tokens either.