The discussions we have around them can be much more nuanced not just whether UB is good or bad, but what has made individual UB releases better or worse than others
Suddenly your Orcish Bowmaster and even Sauron, the Dark Lord himself are Armies, which can grow thanks to Sauron's second ability and trigger his fourth ability
Its a cheap, repeatable sacrifice outlet attached to a land that draws you cards for an Aristocrats player like me, this is mana from heaven
Other notable cards that combo well with Infinite Prison: Mist Valley Falcon Crashbug / Bugman
ATTACHES ANYWHERE YOU GO: The included carabiner and D-ring let you clip this securely to a belt loop, backpack, or bag strap so it's always on hand without taking up pocket space
Quest for Pure Flame seems like a card that can sit around for a while, but it cares about individual opponents being damaged, so it works well with Klothyss ability to damage all opponents