One of the most popular cards to include in an infect deck, especially ones featuring green, is Vorinclex, Monstrous Raider because it doubles the number of any type of counters placed on a permanent or a player
The borderless version is already pretty pricely, so I think theres more value to be gained in the regular copies, but if you have the ability, Cloud holding his sword is always going to be a big draw
While it's hard to tell what Katara, The Fearless does at first glance without its ability text, she's a 3/3 legendary creature that duplicates the number of triggers Ally cards you control create, allowing for a cascade of abilities during a match
You can put them on the stack in any order
Condition: NEW Brand: Takara Tomy Language: Japanese Set contents: 1 Booster Box: 16 Boosters
Wandering Archaic may be the best of these, offering multiple copies of your opponents spells if they cant pay the mana