The biggest benefit of Tortured Existence is how easy it makes getting your best creatures back from the graveyard
I use the term "relative" because by the end of the game both the Freyalise and Ferrafor player had been able to draw upwards of 30 cards in a single turn
5 Isamaru, Hound of Konda As a 2/2 for just one white mana, Isamaru, Hound of Konda is straight value
If I had no other equipment going into pack two I would take a good removal card, planeswalker or even strong archetypal card like a Selfless Spirit over it
Indestructible and protection can be tough to beat, but red even has a few answers to those types of protection, too
If there is an Ink cost next to the ability, then exert that number of cards in your Inkwell to activate the ability