I opened 180k crowns worth of packs, and I didn't get a single spell. I talked to other people who said they have had the same experience since the spring update, one guy even said he spent 200k crowns and did not get a single spell either. Spending hundreds of dollars and not getting a single spell is ridiculous, and either the drop rate is obscenely low, like <.05%, or there's a bug where players can no longer receive spells from this pack post update. So if the drop rate was nerfed in the spring update that might also explain it.