Raid is a guild feature where players can collaborate to kill terrifying dragons, and claim their loot! Dragons get increasingly more difficult the more you fight them, so make sure you bring your best heroes and gear every time!
Raid is a guild-oriented event, so you'll want to coordinate on when to summon a dragon, and which dragon you'll be summoning. Your guild leader or officers will be able to use your accumulated Seals to start a raid.
Dragonslayers and raid gear grant you a new penetration stat.
Abilities work in raids thanks to raid gear changes so stacking penetration on your highest damage dealer hero is recommended. Especially if they have damage over time abilities!
Raid gear with a dragon name on it provides 100% penetration when facing the same name of dragon. Facing other dragons with the same gear results in 50% penetration (and 0% resist)