Here are some of the game ideas you can use to make leagues fun! Feel free to recommend any ideas you have and i'll update this post! Have fun, and remember to join leagues if you haven't done so already!
1.
Potluck.2. Max 35 cards, rares banned.
3. Each player chooses 4 elements that they then send to their opponent. These are the only elements your opponent is allowed to play. You may not use the same combination of elements more than once.
4. Only rare creatures allowed
5. Each player chooses 5 elements for their opponent. Only trios allowed.
6.
Name game Or use this7. The total quanta cost of your cards cannot exceed your deck size +10.
8. Each player picks an element. Must contain 50% of that element.
9. Ban all cards except QP and nymphs, max 10 creatures.
Restrictions you can add to above rulesets (or just on their own):1. Shards allowed.
2. Ban certain elements/cards. Deck size limitations
3. Only mono/duo etc
Credits for some of the rules.