Sometimes, you've just got to play the hits
The Fateful Hour bonus is mostly flavor text, as the Venn Diagram of games where youre not just dead but at 5 life and also have Courageous Resolve in your hand is slim indeed
My opponent blocks it with [c]Haktos the Unscarred[/c], which has protection from mana value 1
What to replace To make room for our modified game plan, here is a list of cards that you can cut
For example, if you cast Shardless Agent, which has a mana value of 3, and the first card you exile is Blue Sun's Zenith, youll keep exiling cards since that also has a mana value of 3 while in exile
That said, the first turn cycle when a cumulative upkeep card enters, it wont have any counters on it to proliferate so youd have to wait until its controllers next upkeep