iridian card sleeves Ryker matte blue back offers a supreme shuffle feel BCW Supplies: Iridian Matte Sleeves

Obviously the card is better if your deck is entirely Knights, but just mostly Knights still gives you a powerful card to work with

However, it is worth noting that CGC and PSA prices can be slightly different

Reduced Glare: Matte prints are less reflective, making them ideal for spaces with varied lighting conditions or where glare is a concern

You can even play some enchantments that double your mana to gain faster access to this combo, like Mirari's Wake

Legality depends on the tournament format -- Sam's Desperate Rescue can be legal in some formats and banned or restricted in others

10 Greenhouse / Rickety Gazebo Fix Your Mana Greenhouse does exactly what you would expect it to do, it helps your lands tap for any color you want it to