Youll obviously want cards that allow you to scry repeatedly, like Gandalf, White Rider, Jace, Mirror Mage, and The Temporal Anchor, but ways to get big spells on top of your library for exiling like Brainstorm and Mystical Tutor are also essential
Gladiolus Amicitia Gladiolus Amicitia immediately ramps you by fetching a land, then turns every landfall into a combat upgrade for your creatures
The card just does an awful lot for two mana
We see this effect a lot, and a Regrowth that only gets permanents is not usually very good in Limited, especially if thats all the card does
Enchantment - Aura Color tag templates(None) Mystic Confluence Choose three
This was one of the original alternate wincons that felt doable in most Magic formats, though its benefitted from an influx of extra gate cards in various MTG sets, which means you dont have to be a 5-color deck to pull off a Mazes End victory anymore