Merlin 

Rarity  Element  Class 

Epic 
Dark/Purple 
Wizard 
Mana Speed  Attack  Defense  Health 

A Average 
682 
660 
975 
Origin  Family 

Knights of Avalon  Avalon 
Special Skill: Arcane Blast 


AllInOne Reference, courtesy of @Lumi tap on image to view it fully 

Avoiding Overspending & Heartache 

Or: How many summons are needed to get an Epic Challenge Event Hero? 
It’s important to remember that Challenge Event Heroes have EXTREMELY low summoning odds. No amount of summoning will guarantee a Challenge Event Hero.
On average, in a 10pull, you have a 25.1% chance of summoning Merlin.
But that statistic can lead our minds astray in exactly how our odds play out as we continue summoning.
Some useful insights:
 50 times out of 100, you’ll get Merlin by pull 24 (6,400 gems)
 94 times out of 100, you’ll get Merlin by pull 100 (26,000 gems)
 99 times out of 100, you’ll get Merlin by pull 160 (41,600 gems)
Putting that in Perspective

50 out of every 100 people won’t get Merlin by the 24th pull

If 1 Million players each summoned 24 times, 500,000 of those players wouldn’t get Merlin

6 out of every 100 people won’t get Merlin by the 100th pull

If 1 Million players each summoned 100 times, 60,000 of those players wouldn’t get Merlin

1 out of every 100 people won’t get Merlin by the 160th pull

If 1 Million players each summoned 160 times, 10,000 of those players wouldn’t get Merlin
More Insights & Reading
I highly recommend reading these two threads for more information and context on summoning odds:
 How much should I spend? HotM cost, and odds, analysis
 What exactly is a Gacha? (Read before posting things about “unfair pulls”)
If you’ve read them a million times before, you may consider reading them again before deciding on your budget for summoning. A little time spent deciding on how much money you want to risk on summoning goes a long way to avoiding disappointment, frustration, and regret later.