I realize this is an old thread, but the grey nymph makes a ton of sense for any deck you would have used aflotoxin in. It's by far the biggest skill cost reduction by taking Aflo down from 8 death (card) to 1 death (grey nymph skill). You could further use the new Shard of Readiness to spam poison the other creatures, and at 1 death or 0 death to do 2 poison / turn, its pretty powerful.