(Unless it's other ponies' loyalty to you
Athreos, God of Passage is a super grindy choice, whose ability can whittle down opponents over time, or recur your Apostles for repeated use
Or, read our guide on how to build a Magic: The Gathering deck for some pointers.
On top of that I keep my computer desk as clean as possible, leaving me with a 3 by 6 foot flat surface of unused space I can use for sorting
"World Legacy - "World Armor"" can help out by searching Spells and Traps, as well as provide material for additional Summons when combined with "Lib the World Key Blademaster" after being milled by "Girsu", as "Lib" can then revive it with "World Legacy Succession"
Legacy of the Duelist and Tag Force Arc-V Special are OK, but since they're not time bound to the specific era I'm building for and include modern cards those older characters would have had no access to, I generally prefer the GX era World Championship games and what I consider the golden standard, the first 3 Tag Force games