Viking Rise on Inbox Pounds offers £34.10 for collecting 23 heroes. For a ‘free to play’ attempt there are only 24 currently available.

I got 23 with only 2 x £0.99 purchases but potentially could have done it with just 1 x.

These heroes you’ll likely get through normal gameplay (early part of story, and LOTS of Hall of Valor summons):

• Svienn
• Waltham
• Ulf
• Eugen
• Lindy
• Snorri
• Erik
• Michaela
• Wooden
• Olena
• Cecia
• Ivor

These heroes may need more work:

• Leidolf – available through the Leidolf in h Hiding event. There should be some Iron or Bronze bells in your inventory from normal gameplay, uses these to summon an enemy that can be defeated to get Leidolf shards.
• Sheila – Can’t remember how I obtain this one sorry.
• Rollo – obtainable by getting to floor 5 (I think) in the Rollo challenge which unlocks quite early. Isn’t too much hassle to do the dungeon game and then you don’t need to play this again.
• Jens – I think I got lucky here as I won Jens in one of the random events. Jens can be selected as a Legendary reward for crystals. I got him on second attempt spending only 250 crystals. You might have to spend much more. You won’t get him through the staging post rewards in the time available.
• Laird – I got some shards through the Wheel of Fortune event and then bought the remainder at the Mall for £0.99. I ended up getting enough shards after that I didn’t need to pay.
• Ivana – Obtainable by participating in the Sacred Crucible which nlocks at Chief Hall level 15. I played two games and had enough points to buy the Ivana shards. Took about an hour.
• Sigurd – Got him same way as Jens using crystals
• Varka – Obtainable by completing the staging posts quests
• Yvette – I think she is available in the First Purchase pack which I bought for £0.99
• Gregory – I think he was obtained through the story, I had him very early on

The last hero needs preparation:

• Verdandi / Arthur – Available through the Viking Reign event which happens once a week or once every two weeks. You need to score in the top 100 of users to be awarded 10 hero shards. You’ll need around 2 million points to reach the top 100. I got 4 million and place around 50th. Read the rules of the event but main thing is to save resources, gems and speed ups before the event starts and then use everything available to push up your score. The event lasts over 5 days so does require a bit of management to make sure you can participate each day.

General tips:

• My chief hall was Level 18 when I stopped playing, I think 15 is enough though
• Keep training troops when you have resources as you will need them for the Viking Reign event
• Participate in the regular events to obtain more Oracle Soulstones
• Use gems for Oracle Soulstones when available
• Upgrade the Hall of Valor early to reduce time between free summons
• The other heroes on the list are definitely not obtainable without spending much more money than the offer pays out.
• You can buy some hero shards for Clan points at the Honey Tavern which is in your village.
• Complete the daily tasks to get an extra Oracle Soulstone each day.

20 heroes for £19.10 is definitely achievable with some casual play over the 40 day offer window. 23 is more work and might need a bit of good luck to get the right summons.