Relic
Vanguard's Titanic Engine
Legendary
Effect
Heroes gain 400 Max HP.
Whenever a 
Vanguard auto attacks or is auto attacked, they gain 10 Max HP. Every 200 Max HP gained this way, give them 25 Attack and increase their size.
Where it drops
- Auction House (Legendary Relics)
Other Legendary relics
Questions people ask
What does Vanguard's Titanic Engine do in Guildrun?
Heroes gain 400 Max HP. Whenever a Vanguard auto attacks or is auto attacked, they gain 10 Max HP. Every 200 Max HP gained this way, give them 25 Attack and increase their size.
What is the difference between a relic and an item?
Items are equipped by a single hero and take up one of that hero's slots. Relics apply to the entire guild and do not use slots. That makes relics the stronger of the two when a build starts coming together.
How do I increase my team size?
Harmony Crystal raises it by one, up to five. So does each of the fifteen Mandate relics, but those require finishing an objective first, like dealing 15000 auto attack damage or applying 30000 shields. Pick the Mandate that matches what your team already does.