The implied way is to create a change and allow players to fill in the full moon flavor themselves
In terms of cost and vulnerability Baneslayer and Wurmcoil are fairly comparable
Every deck needs to be able to have a way to draw cards or conserve the cards in their hand by providing alternate ways to cast spells and summon creatures
Lets say youve got a character in play, any character, doesnt much matter who, and your opponent spends all their ink dropping a massive high-cost threat like Stitch, Abomination
I also like Lich-Knights Conquest as a second copy of Living Death, especially if youre running cards that make treasures, like the stellar Lotho, Corrupt Shirriff
And while you wont get the treasure when you go that route, you will drive your opponent crazy by stealing their creature, hitting them with it and gaining life, and then sacrificing it to Goblin Bombardment or Fanatical Devotion is pretty amazing