While Venerated Rotpriest obviously synergizes with the spells you cast, even in the worst case, its a guaranteed Poison Counter
If two or more replacement and/or prevention effects are attempting to modify the way an event affects an object or player, the affected objects controller (or its owner if it has no controller) or the affected player chooses one to apply This basically means, if you have two or more replacement effects, the person being targeted picks the order they will apply
Given the ease at which Jodah can cast Time Stretch and take two turns on turn five or hard-cast, and get cast-triggers, for the Eldrazi Titans, Jodah will win very soon thereafter
Afterwards, why not check out some MTG draw cards for different MTG color combinations
If an opponent chooses that card for any purpose, it's discarded straight away