mtg blue flicker cards Mystic Confluence Flicker of Fate | Magic:

Most sacrifice outlets want you to sacrifice cheap tokens, but this black human wizard encourages getting rid of the biggest boys for cards and life, and I enjoy the dynamic

Every color has access to it as a solid way to either make its creatures modal (via X-spell creatures that enter with X counters) or capable of growing into the late game

Niv-Mizzet, Visionary's also a simple and elegant design that goes together with previous Niv-Mizzet cards that care about drawing cards, and as an Izzet commander it's probably one of the best commanders in Foundations

When you spend this mana to cast an instant or sorcery spell with mana value 3 or less, you may exile that spell instead of putting it into its owner's graveyard as it resolves

Thats two decks without access to green or blue, and theyll both need some type of card advantage, ramp, or card draw included in order to run smoothly