thanos slot

5TH ISO SLOT. Once you level a hero to level 250 it will unlock the 5th slot for that hero. You need to finish the story on Friendly/Mighty difficulty first to be able to reach level 300. 4TH RANK-UP SLOT FOR ABILITY'S. Finish the story on Superior difficulty to unlock rank 5 for ability's and to unlock the forth rank-up bonus. rtp slot kera4d