You need to consider and present the details of this as though it were an actual card. I can't tell for sure what you are intending.
I can tell you that your cost scheme does not make sense. It needs to be tied to the bound spells in some way, not just arbitrarily set costs. Also, I can also tell you that the casting cost of an enchantment is only 2 the reveal cost is the often real expense and I don't see how you could thematically tie that to a scroll.
Here is my best guess at a reasonable way of setting up a scroll.
Arcane Scroll Equipment, Metamagic School: Arcane, lvl 1
Cost: X Quick Action Range: 0-2 Target: Mage
Spellbind
You may bind a non-Epic incantation spell from your spellbook to Arcane Scroll. Immediately before or after your mage takes his action phase you may cast the bound spell as a free action paying the full cost of the spell as normal. Destroy Scroll after use. X= Level of Bound spell.