Quote from Mergatroid_Jones »High Holy Day: A card with converted mana cost exactly 7.
AP Credit for Alchemy: All your cards are rare artifacts.
No Time to Read: None of your cards has more than fifteen words of rules text.
(I wanted to have the neat little icons, but it says "Non Latin Unicode characters are temporarily not allowed".)
Orb of Infinite Failure
Spells cost your opponents an additional to cast.
Constant failure is an excellent teacher.
I think that if you plan to hardcast it, it's not very exciting. At such a stage of the game the effect comes more as an annoyance that might slow your opponent a bit or keep a bomb out of cast reach for a while, but for buying time there are more reliable tools. In limited formats this is something you wouldn't want to be opening.
However, if you start to think what you can end up doing with it, it gets a bit more interesting: Cheating this into play aa early as possible can have devastating consequences for yoir opponent while turning you into a very hated opponent. Welder and Transmuter are the ways of cheating this into play from the top of my head, but they need some setup. This might work also as a final nail in the coffin if paired with some resource denial.
Now in commander, this might be a tool for keeping problematic commanders from cast range, but other players will not like it very much. Is that kind of effect that annoys you since you can endure it as long as something worrying is kept at bay, but it demanda to be blasted away sooner or later. it might be something to give a try at least, but the commander pool is so huge and varied it's hard to find room for it.
The effect is very clean, and althought I can't really see it working too well it haa a certain charm that invites you to think around it.