The main drawback here is in the multicoloured Mana base, which has a possibility of backfiring spectacularly for new players if they fail to draw that one particular multicoloured Land to cast their Dragons
Vadrik, Astral Archmage and Kaza, Roil Chaser can make instants and sorceries even cheaper in the right circumstances
The rest of the deck also has ways to get a Lore bonus once banished or add some defense to your heroes, and the amount of tactical options at your disposal keeps the challenge-focused gameplay from getting repetitive
Other highly sought after cards sold for several hundred thousand dollars too
Maybe if the table is down to you and one opponent and it makes sense for that one player to cause them to discard their hand and draw seven new cards
These three cycles form the foundation of optimized mana bases in Commander , Modern , and Legacy