They have their own individually rarity
Dragons Approach This Strixhaven burn spell is the most recent of the rule breakers, and easily the most unique
One is the Ritual-focused series, which is supported by the "Gaia The Fierce Knight" archetype and a trio of "chibi" Envoys, and the other is the "Chaos" series of Effect monsters, best represented by "Black Luster Soldier - Envoy of the Beginning", which can Special Summon themselves by banishing a number of DARK/LIGHT monsters from the owner's GY
What are mechanics that emphasize alliances being formed, and call back to the original Invasion set
Activated WL Survivor, excavating Crusadia Krawler, Orcustrated Climax, Crusadia Draco, Crusadia Arboria, Knightmare Corruptor Iblee, but since none were World Legacy cards, all 5 returned to the deck
Based on the latest market prices tracked on TCG Stacked, Friarball is worth about $0.17 USD