These are usually included to prevent players from gaining life while helping get chip damage in, like Roiling Vortex and Sulfuric Vortex, or they punish players for simply playing the game, such as Burning Earth and Manabarbs
If you're building your own deck, then that's part of the challenge, making sure you have enough but not too much
About 24 spells and 16 lands in total, your deck is ready
There was nothing wrong with Yuhi adjusting the speed for the first time, but when he collided with Bari Belgya and there was a problem with speed control, he ran out of control and swept the streets.[10] In the official introduction, it is said that he created several astronaut capture equipment, but it is not mentioned in the story, and Yuhi's inventor attributes are limited to making Yudias' special training tank in episode 7, and showing various tools and miscellaneous items placed on Yuhi's desk in episode 14.[11] Teru Kawai said that Yuhi's Duel ability was reduced because he lost his Earthdama, but judging from what he said afterwards, it seems that the reason why he couldn't recover his skills after that was because he didn't practice properly using Earthdama as an excuse.[12] When Phaser added Interstellar Change, he had Zwijo in mind as the character to continue the duel and placed Zwijo's Voidberg Requiem in his deck

Strengths of the Deck Decks that rely on a few big cards to put pressure on the opponent can fall apart in front of Blaze Accelerator, such as a Future Fusion opening by a Dragon player
I want to like Heart of a Warrior, but I feel like its not useful right now