You're only given a little spark...
The Epic Shield Initiative is manufactured by Anshin and comes from the Borderlands 3 Guns, Love, and Tentacles - DLC.
0 Shield Capacity & Recharge Delay/Rate!Synergistic Gear: InfiltratorSynergistic Skills: Zane - Rise to the Occasion
+13% Weapon Damage+23% Reload Speed-13% Damage taken+50% Health
Initiative's Drop-Rates and all Sources:
The Initiative from Borderlands 3 and can not be obtained legitimately. The Save Editor is the only way to get the Initiative.