Anyone who has ever used an MTG card database to build a Commander deck knows that there are a LOT of Magic: The Gathering cards
The loop fuels more plays
The first 2 pics are the external black border of a fake Revised dual land (an Underground Sea) and the border of the real one
Urza, Lord High Artificer As annoying to play against in the 99 as it is from an opponents command zone, Urza, Lord High Artificer is the most popular mono-blue commander for a reason
Counterspell The most iconic counter in Magic: The Gatherings history has long been deemed too strong for Modern by many, and control players around the world will happily unsleeve their Mana Leaks to make room for it
Dragonhawk, Fate's Tempest Dragonhawk, Fate's Tempest needs to be in a creature-centric deck to do real work, but it does so much if you have enough 4-power creatures (which is a lovely call back to the ferocious mechanic from this creatures plane of origin)