Good Day Mister natanoid~
Please allow me to share my experience and my knowledge about Monster Clash. ^_^
Well, Mister Shai said it perfectly but for the sake of easy understanding grant me the permission to add what he wrote.
1. For me, Slayer is the best Class for Monster Clash (considering with Seraph Buffs already that Increases Hit Points and Person Versus Enemy Damage Percentage). Hence, having PVE Awake's on Fashion, Mask, Cloak and Accessories is a bonus thus, increases your monster damage.
2. Yes you can still participate in Monster Clash as long as you are the Guild Leader and Registered, and must reach the Max Level in the server (175). In inclusion to what Mister Shai said, there must be at least two (2) Guilds applied for the Clash, your Guild and the opposing Guild. In our case, If we don't have an opponent we apply a Guild for the sake making it happen and we call it a 'Dummy Guild'
3. Yes it's location is in North Flarine inside the a wooden stall. The NPC's name is Donaris [Monster Clash Manager].
4. There are three (3) stages in Monster Clash,
First Stage, Ordinary Monsters such as Kalgas, Kheldor, Drakul, Lykan and etc.
Second Stage, called Middle Boss, 'The Statue' with 1 damage per hit and has 200 HP.
Third Stage or the Last Stage, (God of Death) Ankou.
If you successfully, made it till the last stage and survive. You will receive a (1) Monster Clash Winner's Box ~ containing the following: 100 pieces of Remantis Laccote, (1) Blessing of PVE Awake, 5 Red Chips and 10 Red Chips (all are in random once opened) together with these is
Monster Clash Seals (In random count specifically, 20~98) which can be exchanged with MC Items such as Thor's Hammer, Pizza Shield, Iron Man/Hulk's Fist and etc.
5. It costs for (1) Red Perin and should be the Leader of the Guild. Talk to the NPC in charge and choose 'Apply'.
So, Basically that's it. I hope you have an idea what Monster Clash is all about.
Thank You and Good Luck ^_^
Hope to see you soonest.
love love love
fun fun fun ^___^