Aether Hydra

when aether hydra gets a +1/+1 counter for the first time, give it -0/-1, if it gets a +1/+1 counter for the second time, third time, fourth time etc. you may give it +4/+4 instead, other wise, you gain 3 life and add {r}{r} to your mana pool, when aether hydra dies, give target creature +aether hydras power/+aether hydras toughness, or you gain life equal to half aether hydras power or toughness (your choice), if the power/toughness is odd, instead add {r}{r}{r}{r}{r}{r}{r} to your mana pool.