So, I am having trouble with these two card's interaction with eachother. If I have a Necrotic Ooze on the battlefield and a Skirsdag High Priest in my graveyard, can I use the Ooze for the Priest's ability(assuming a creature died that turn, of course)? It seems to me like the Priest's ability is both triggered and activated but I'm not sure. Also, I have many more questions about the Necrotic Ooze so if anyone can point me in the direction of his interaction with other cards, it would be greatly appreciated. Thanks!