Special events provide participation rewards which in this case was 1 single daily summons.
May I suggest better participating rewards for those that complete all 3 event types being Rare, Epic and ledgendary.
All that hard time and hard work in completing the whole lot for a single daily summons hardly seems right.
Maybe an epic token or tokens for each stage would seem more appropriate over a single token for all 3 stages.
Just a thought put out there.