Forerunners General feats --Possessed 3million worlds and were expanding; could build worlds to replace lost ones. --Could construct planet breaking ships within minutes, and had an industrial capacity that allowed an underfunded proof of concept project to construct the equivalent of the Death Star II every 5 minutes non stop for around 8,000 years --Could casually destroy planets with their technology; a disgruntled Forerunner Miner shattered a planet out of spite once. Forerunner naval tactics regularly destroyed stars to vaporize enemy solar systems using simple ships. --Regularly mined the resources of entire planets at a time. --Could output the energy to power stars casually for indefinite amounts of time --Could create pocket dimensions, had temporal manipulation and peered into multiple time streams and multiple dimensions with multiple detached consciousnesses to coordinate battles (the exact details of this I am fuzzy on however; Will search for sources later). --At the end of the Flood war, the Forerunners were still fielding fleets hundreds of thousands strong, each with continent or possibly even planet cracking firepower. For context, a quarantined system with "trillions" of automated defense drones weaving in and out of space-time to create a solid sphere of distorted reality around 2 entire planets being overseen by a Didact-equal Promethean commanding a 50 kilometer ship that could lay siege to an entire planet, perhaps more, was considered barely worth remembering. Said quarantine was established and left to be forgotten. --A Forerunner Warrior could control a million drones called "weapon ships" on his own. --Forerunner battlesuits could lay waste to cities of their scale and threaten entire continents. --Terrestrial combat involving the Forerunners often resulted in hurricanes of fire stretching across the landscape, large chunks of the planet's crust being ripped out and spun about only to be used as crushing meteors, and no RoE. --40 Onyx-class sentinels could obliterate a Covenant warship; their are at least trillions of them defending shield 006, implying their are at least 5 others like it. --Forerunner engines run on vacuum energy, energy siphoned by killing off countless young and nascent universes. Librarian refers to this as "cosmic predation."