If a permanent enters the battlefield under an opponent's control with hexproof, indestructible, protection, shroud, and/or ward after Shay Cormac's first ability resolves, it won't lose that ability until you activate Shay Cormac's first ability again
Spellcraft lands are available in both non-foil and traditional foil in Play Boosters and Collector Boosters
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However, after that, the Challenge Cup is not always open
Getting a bunch of 0/1 creatures is a great way to shield your life total from many threats with haste after a Day of Judgment, and then you can sacrifice those that make it to your turn to rebuild your board position with minimal fuss, and possibly even a Blood Artist trigger or three
Archetype of Courage Archetype of Finality and Archetype of Courage are clearly the worst of the pack, and Courage wins by a small margin