I could loop a Wurmcoil Engine or Myr Battlesphere as they make enough creatures to use mana from Ashnod's Altar to pay for Deathmantle activations
Avoid starting with five or six different attackers that do unrelated things
It can be a hassle, but it request a picture of the box when possible when if you buy from eBay, Amazon, etc
Another huge perk these cards have over countermagic is that you can use them prior to doing your stuff giving them only one draw to find a solution but giving you the ability to spend all your mana on going off that turn
Rare and expensive cards are often the plaything of ultra-rich collectors - Post Malone has purchased at least two other Black Lotus cards in the past, and YouTuber Logan Paul claims to own several million-dollar Pokmon Trading Card Game cards, including a holographic Charizard worn around his neck during a boxing match
Against other fair decks, Ragavan, Nimble Pilferer isnt as good, especially against creature-based decks that can easily roadblock a 2/1 creature