Competitive EDH (cEDH) is a multiplayer format for the Magic: The Gathering card game. The format consists of building Commander decks that are competitive enough to win in the first few turns of a game. Some decks have the capability of winning on their first turn!
The MTG Reserved List features a list of cards that Wizards of the Coast said they would not reprint in future sets or products. This means that the cards on the Reserved List have a finite print run. Reserved List cards played in cEDH can be very expensive to acquire like The Tabernacle at Pendrell Vale and Timetwister. However, there are a few Reserved List cards used in popular cEDH decks that players can purchase for under $5.00.
Abeyance is a Reserved List rare from the Weatherlight set. This instant is featured in lists for the Heliod, Sun-Crowned cEDH deck. Abeyance acts as a second copy of Silence, but less powerful. It is another tool used to help protect combos; especially, in white-based decks. At under $5.00, this card is an inexpensive option for cEDH decks that want more Silence-type effects.
Altar of Bone
Altar of Bone is a Reserved List rare from the Ice Age set. It is a sorcery speed tutor that allows a player to search their deck for a creature. This card is an inferior version of Eladamri's Call. However, it does provide cEDH decks such as Atla Palani, Nest Tender with additional tutor effects.
Carnival of Souls
Carnival of Souls is a Reserved List rare from Urza's Destiny. This enchantment sees some play in the Yawgmoth, Thran Physician cEDH deck. It can be used for mana acceleration or as a combo piece. It can be used for mana acceleration and as a combo piece. While a niche card, Carnival of Souls is an inexpensive option for cEDH.
This list is short due in part to the nature of the Reserved List. Since Reserved List cards are not reprinted; increased demand for a card can drive prices past $5.00. Also, the rise in popularity of cEDH has push prices higher for Reserved List cards like Gilded Drake and Transmute Artifact. Abeyance, Altar of Bone, and Carnival of Souls are inexpensive Reserved List cards that can make an impactful splash in cEDH.
*The information in this article is of my own knowledge and opinion. It is meant for informational purposes only.*