There is a huge diversity in ability effects, such as letting you draw more cards from your deck, getting certain cards into your hand when you need them, and even simply increasing attack damage
Thats understandable, since Ring of Ma'rf was the first go at this effect by WotC
card game except that, similar to Duel Links , players can only summon up to three monsters
Three mana is costly to hold up, so unless you can shave the mana cost with something like Jet Medallion, or have other mana sinks you use in case you dont need to cast it, Id hesitate to put it in your deck
Torchic - 11/25 - Holo - McDonald's 25th Anniversary Promo Heavily Played, 0 In stock NM-Mint, 12 In stock Lightly Played, 17 In stock Moderately Played, 2 In stock Damaged, 0 In stock Details Set: McDonald's Promos Card Number: 11/25 Rarity: Promotional Retreat Cost: C Weakness: Water HP: 60 Stage: Basic Card Type: Fire Name: Torchic Finish: Holo Manufacturer: The Pokemon Company