I had a ruddy great time with Wizard Wars. It's team game take on Magicka's versus mode is one of the most batshit brilliant versus games I've played. News that its preorders have begun, then, is good news.
(Let's not question the whole preordering a free-to-play game thing.)
I'd suggest simply g up for free but if you'd like to spend money on a game you've not yet played then Paradox are providing the ways and means to do so.
For $13 you get:
Green Founder's Robe
Founder's Staff
Green Founder Wizard Forum Avatar
Founder's Forum Icon
For $20 you get:
All items in Pack 1 & 2
Yellow Founder's Robe & Staff
Green Founder's Robe & Staff
Yellow Founder Wiz Forum Avatar
Green Founder Wiz Forum Avatar
Founder's Forum Icon
"Dev's Dungeon" Forum access
Community Founder Wizard Credit on the Website (invaluable)
Crusader Kings II steam key (Value €39.99)
And, for $50 you get:
All items in Pack 1, 2 & 3
Red, Yellow & Green Founder's Robe, Staff & Weapon
Imp, Red, Yellow & Green Founder Wiz Forum Avatar
Founder's Forum Icon
"Dev's Dungeon" Forum access
IMPressive Community Founder Credit on the Website (invaluable)
Name an Imp – forever walking around in the game (priceless)
A special founder Imp skin – your imps will wear a founder hat
In-game currency; 100,000 Crowns (Estimated value ~$20, introduced a couple of weeks after release)
3 Alpha Day-1 invites
Crusader Kings II steam key (Value €39.99)
You can look into all the different order options here. There are pictures. That's a warning if such things may sway you.
No word on when the beta will launch unfortunately.