For about 15 days or more (santa 1 month), these events have a calendar of daily offers.
Epic tokens can be used to summon seasonal heroes.
There are minimum 20 levels (2 modes : normal and advanced) and no rankings
Here the last seasonal events.
SpringVale
Cap’s publication : 🌿 Memento seasonal event
Caps full guides: 🌿 Memento seasonal event
Return in Morlovia
Cap’s full guides: 🌿 Memento seasonal event
Sand Empire
Cap’s publication : 🌿 Memento seasonal event
Link classic events > 🌟 Memento 5 Challenge Events