mtg card rarity guide MTG Rarity Guide - Magic:

Such an overwhelming majority of the best decks were blue, why not maindeck Red Elemental Blast

Blue is known for being relatively bad at countering creatures in cEDH because so many of the cheapest blue counterspells dont counter creatures, as youll see in the rest of this list, so being able to counter legendary creatures (especially commanders, of course) is a really nice perk for Tales End

Similarly, Pearl-Ear, Imperial AdvisorPearl-Ear, Imperial Advisor also gives you card advantage and reduces the cost of any enchantments that you cast based on the number of Auras that you have

Bygone Bishop If you cant draw cards directly, creating Clue tokens is the next best thing