Due to the fact that your spells can only be interrupted twice the rats are no longer a problem. You can actually get a seed of corruption off or not have your rain of fire instantly canceled.
However, if you still have problems for some reason, the eye of kilrog will set the trap. So just get away from where the rats would run and send your eye in then you can just walk by.
Edited, Dec 18th 2008 5:52pm by ccbutch