Lernaean Hydra

Lernaean Hydra comes into play with X +1/+1 counters. When Lernaean Hydra would be removed from the battle field instead tap it and put a +1/+1 counter on it. Each time a +1/+1 counter is placed on Lernaean Hydra that is produced from being removed from the battle field, Double the amount of +1/+1 counters on Lernaean Hydra