mtg commander card size YSCare 6 Pack Deck Cases, Deck Boxes with 600Pcs Card Sleeves and Dividers, Standard Cards Storage Box Perfect Fit for MTG, Sport, Trading Cards (6 colors) : Toys When Tishana enters the battlefield Scholar of New Horizons

The text box tells you what it does (rules text)

Because of this R&D tends to be more aggressive in costing these types of discard cards

Cards Found In Commander Decks These four 100-card preconstructed decks are for Magic's most popular format, Commander

The main set version features stunning artwork from Volkan Baga, the borderless Gauntlet version depicts Thanos and the Infinity Gauntlet, and the ultra-rare borderless version appears in cosmic foil without rules text, allowing fans to appreciate the treatment in its entirety

After these common and uncommon cards, the 9th card in a Set Booster pack is the head-turning slot, as Wizards puts it