My personal Milestones are:
- 2000 monsters obtained.
- Top 1 PvP
- Top 2 UC
- Completed Dungeon Challenge with 4 monsters (inspired by @Unown)
- Completed Twice Super Challenge Battle Extreme Lv2 with 4 Super Epics only
- Completed 4 vs 100 in Game of Hordes
- Completed 4 vs 30 mythics in Game of Hordes
- Completed all Okkult’s final cases with 4 monsters only
- Beaten all bosses of Whale Treasure with 4 monsters only.
- 58 win streak ranked PvP
- Completed every released event PvE