Mixed WeatherBlight Bats

Haste
Put a +1/+0 counter on Mixed
WeatherBlight Bats for every bat that was sacrificed to it.
You may sacrifice up to 3 bats each turn the owner of this card.
If the owner were to switch to another player reset the counters.
Bats are worse than a hydra I'd say, you smack just one, hundreds shall come to its rescue.