They all notably possess a powerful effect that triggers if a monster(s) is Special Summoned to a zone it (or another Link Monster) points to, and performs mass removal of a certain type of card
To be specific, here is what you can expect to find in regard to Showcase Scroll cards in Special Edition Collector Booster packs: Two Silver Foil and two nonfoil Showcase Scroll commons Two Silver Foil and two nonfoil Showcase Scroll uncommons One Silver Foil and one nonfoil Showcase Scroll Rare/Mythic In other words, you are guaranteed ten Showcase Scroll cards in every special edition Lord of the Rings Collector Booster
An opponents card will be dealt with, but something new will be spawned directly from their library in its place
On top of that, we already have a number of recycling effects, adding too many could create conflicts during a duel, in which Blessings for Gusto is competing to be used before Contact with Gusto, Reeze, and Daigusto Gulldos, among other cards
Channel is a Green Sorcery that costs two green mana and allows a player to add a colorless mana to their mana pool for every 1 hit point they pay