When he first appeared in Tarkir, players quickly realized he could control nearly every permanent type while being playable in any deck willing to reach eight mana
(If a creature with a finality counter on it would die, exile it instead.) Illustrated by Irina Nordsol Standard Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
However, the don't have any color-specific subtypes, so tutoring for them will be difficult
As an example, one of the most precious cards, the Black Lotus, can cost from 100 to 250 thousand dollars per card
Most, if not all counterspells are instants, so anything that synergizes well with casting a lot of instants can reward your counterspell-heavy deck
We saw the principle in action over this past weekend, where six of the eight decks in the Top 8 at #PTOGW were so-called fast ramp