I have a question about a combat trick involving the cards mentioned in the Title. Situation is:
On my turn I declare both of the Hydras as attacking creatures. As such the Kalonian Hydra doubles the number of +1/+1 counters on both Hydras, making both of them 8/8 creatures. My opponent decides to block my Vastwood Hydra with multible blockers, wich would do leathal damage to it.
So when blockers are declared, before combat damage is resolved, I cast Mercy Killing on my Vastwood Hydra. As a result 8 Elf Tokens comes into the battlefield, and triggers Cathars' Crusade (and makes all the Elf tokens 8/8 Elves, but that is not important in this situation)
It also puts 8 +1/+1 tokens on my Kalonian Hydra, making it a 16/16 Hydra. And when the Vastwood Hydra goes to the graveyard (because I sacrificed it) I distribute all of its 8 +1/+1 counters to my Kalonian Hydra and makes it a 24/24 Hydra.
Combat damage resovles and the kalonian Hydra kills off my opponent.
Is this how it would work, or have I missed something?