can you use proxy cards in tournaments mtg Ugin's Labyrinth - Custom Proxy for Commander Proxy card - Wikipedia

Pitch a Bloodghast and you have yourself the best one mana removal spell in the game

[cards] Ponder Preordain Brainstorm Thoughtcast Thought Monitor [/cards] The deck is intentionally packed with cheap draw spells like [card]Ponder[/card], [card]Preordain[/card], and [card]Brainstorm[/card], as well as affinity-based draw like [card]Thoughtcast[/card] and [card]Thought Monitor[/card], to ensure those counters build up quickly

In Mark's article "Game On," he goes more into how we approach this in our Universes Beyond sets

Can you imagine the carnage if you use it to cast something like Crackle with Power or Genesis Wave

Shuffle away opponents top deck tutors or reveal to the table which 5 cards the Bolass Citadel player will be getting next turn

The D23 Collection cards feature expanded artwork that extends to the edge of the cards, revealing more of the scenery