And if you cant find enough Nightmares to staff your grisly mill, Umbris also works just as well with Horrors, giving you more options during deckbuilding
Rite of Harmony can also flash back later when the player has the spare mana for it
The payment of three life was often not super relevant, especially since even now, two cards for two mana is quite the bargain
Skullclamp Theres a well-documented story that Skullclamp originally gave +1/+1, but the designers deemed that too powerful and switched it to +1/-1
From the Doctor Who set well add Five Hundred Year DiaryFive Hundred Year Diary, a Clue itself that provides a blue mana for each Clue we control, and Martha JonesMartha Jones, who can help us make our creatures unblockable when we sacrifice Clues
But Final Fantasy introduced sagas that are also creatures, which could be targeted with effects like Tishana's Tidebinder, Fresh Start, or Unable to Scream (since these all affect creatures)