Ramp it to the battlefield, and it's even untapped ready to be used
You dont need to invest any additional mana other than the potential equipping cost
Galadriel, Light of Valinor is limited to three triggers per turn, but if you can trigger one or two reliably, its already very good
For example, if two creatures you control with lifelink deal combat damage at the same time, Excalibur II's ability will trigger twice
Do the first for someone mana screwed to help them out (there is always someone) and then the last two to folks breaking an artifact like Skullclamp or Mind's Eye and then punish the other for holding a full grip
The constant stream of free spells off the top of your deck is just too much value for your opponent to deal with, and the ability to hit your opponent for 10 life with Kefka's Tower shouldnt be underestimated either