Originally Posted by Brettakisse
So I've never played karma (only seen her once), why would you want to shield a ward?
Whenever she activates a Mantra (her "ammo" charges), when you use your E (Soul Shield) it will shield an allied target for some flat number + AP and it will deal AoE damage with the same flat number + AP to all surrounding enemies.
So essentially, during the laning phase, you can place a ward in the middle of the lane, so when the enemy champion walks near it, you can "trap" them and deal damage to them without them realizing it. You could basically play zoning games with the enemy champion until the phase is over or if they buy an oracle's, at which point, you made them waste 400 gold.