Time Bomb is now known as the Temporal Rift and is cast by the High Templar.
Plasma Surge is no longer in the multiplayer version of the game, but will still be in the editor.
The Dark Pylon is now known as the Obelisk - primarily because it no longer cloaks units and no longer provides pylon power/supply. This change was mostly due to balance, since it is relatively easy to spam Dark Pylons everywhere and instantly have a Psi Storm recharge point to decimate incoming forces. Karune. 2009-06-08. Lack of EMP = more Archons? (post 11)Battle.net StarCraft II General Discussion Forum. Accessed 2009-06-09.