Probably it can seem overpowered or a powercreep of immortal, but Time element doesn't have a card like Dimensional Shield that can actually support the low fire rate of Immortal for killing your opponent and doesn't have other "rush" card like wyrms or lava destroyers. Adding scribe in
deck means that u need to use a time mark, which isn't a great idea since u probably play phase dragon that is one of the card that costs more in Elements. Also u still lose against every
stall/mirace, every
+
stall; Even with with SoW u can't take down a stall that cast at least 6 SoD plus at least 2 Miracle, poison bypass Dimshields, u actually gain something only against Bonewalls + spells stalls. After this u still lose against any deck with SoG or with a lot of permanent control.
Every card can seems broken if that card counter a playstyle/deck archetype (think about purify/miracle against a poisondial, or a dimshield against every rush deck not called SoF rush).