[mwcard=FWA02]Force Hammer[/mwcard]
[mwcard=FWA03]Hail of Stones[/mwcard]
[mwcard=FWA04]Hurl Boulder[/mwcard]
[mwcard=FWA05]Invisible Fist[/mwcard]
Those are the current attack spells without any association with a particular damage type. That's a grand total of 4 out of 19 attack spells currently released (not counting promos or previewed spells). So, roughly 79% of attack spells are linked with a damage type, and wtcannonjr's statement does have some merit. But it does show there is room for those without such an association.