It is because there are not that many UG archetpyes, many of those combo, and so the Agent is not always suitable
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It will help Gallifrey Stands go off, but will also help your suspended cards and other triggered effects
Bloodvial Purveyor Decree of Silence Ghostly Pilferer Hermit of the Natterknolls Reparations Rhystic Study Silverquill Silencer Talion, the Kindly Lord Vazi, Keen Negotiator
Im aware that some of these cards have uses, but its much harder to make a list out of Modern than pre-Modern, so it cant be an entirely useless list.
On the land side, five pixel lands apply a retro video game look to the basic Plains, Island, Swamp, Mountain and Forest cards, with an added frame that evokes old-school Microsoft Windows with a title bar and minimise, maximise and close buttons