SM get their Orbital Bombardment for free when they hit T3.
IG get Strafing Run at the same time but its rather sucky.
Eldar and CSM have to research their spells and so pay extra, even though they suck compared to OB.
Orks don't have a T3 spell at all 0_o instead the Squiggoth has that Rampage thing but its all Tier 4.
So umm, whats the reasoning behind the spells, why won't everyone get them for free or every1 have to research. This current system doesn't make much sense to me.
SM already got WotE and deepstrike anyways, and still get their spell for free!? Whats up with all this SM wank?