cards, the value of Breaker the Magical Warrior depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Structure Deck: Spellcaster's Judgment)
You can use it to remove unfavourable blocks and, after damage has been dealt, to give a sudo vigilance to creatures
The former, on the other hand, destroys all non-token creatures, which can be of little use against some decks if, for example, Bitterblossom or a similar card that quickly creates tokens is already in play
First off, you could just do something like MtG's land system, where lands are shuffled into your deck and there's some randomness to whether you will draw them or not, and you can play a maximum of one per turn
Magic: the Gathering Arena A First Look Wizards finally unveiled the new Magic: the Gathering Arena game
Your LGS Every LGS should have at least a few of these decks