Looks nice. For ease of adding, could you put them in a sheet in this order: Weapon,Shield,Permanent,Spell,Creature.
If you decide to add a specific one for pillars, that one should be first.
Anddo you guys want the icons where Ravizant suggested (lower-right corner of the card) or the place where the serprex's text icons are now (lower-right corner of the card art)?