First of all, are you a part of an active Guild?
If so, some good sources of HBs in game include:
- Daily Boss 3 challenge
- Expeditions, the further you go, the more you earn.
- Completing some quest board tasks.
- Completing or sweeping dungeons
- Blitz gauntlet (rewards only after the season ends)
- Pirate Booty event
However, the best ways of acquiring enough HBs are:
- Selling off Tomes (XP books). The best ones to trade for HBs are the Golden ones. One golden book will get you 40k in HBs. But only trade these off as you need. Cause those books are worth their weight in gold, especially for BT leveling.
- Buying them in Bazaar packs. Nowadays IGG sells HB packs for like $5. And it often comes with shards and gold coins or something like that. You'll probably get a TON of HBs from one of those, and well, that should last you for a short while.
Hope this has been helpful?
P.s. if you need to join a Guild, and you are on Android, look us up. We are Iron-will!