Note: This event is now over. Hope people won lots of cool stuff!
We've got a new event going on at the 12 Tails site, and it's just as nice as most of the others, if not moreso!
Here's what you do, go here: http://herorangers.com/activity/T12_TigerCard/Default.aspx
Sign in with your username and password, then select one of the cards that shows up. After that, simply select your server and it'll be sent to you in your mailbox! I've heard (And seen) things like mupo mounts, lucky boxes, angel elixirs, and reskill drugs are up for grabs, all of which are very nice! Don't miss out on them!
Edit: Here's an image that has all the possible prizes: http://12tails.herorangers.com/picture/DisplayPicture.aspx?id=8723