Interesting concept and idea but perhaps a bit overpowered. The setup is also a tad plain but a good job overall.
Nice but you should include a Link to the Contest and this format:
Info: Some info about your Killstreak.
Name: Name of your Killstreak
Kills/Deaths needed: How many kills or deaths do you need for this kill/death streak?
Effects: What does it do, how is it called in, etc.