Learn cards work as designed in Constructed tournaments, meaning you can put up to four copies of a single card with learn and grab lessons from your sideboard when they resolve
P/T Number 9 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pauper, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Standard Rulings (4/29/2022) Shield counters don't prevent players from sacrificing creatures
Other black creatures you control get +1/+1
REAL As you can see on this example, the dots and lines are sharp as a knife
Pokemon TCG: The Pokemon Company International utilizes basic rarity symbols (circle for Common, diamond for Uncommon, star for Rare) but quickly escalates into a dazzling array of Holo Rares, Reverse Holos, and various "Ultra Rare" categories that have evolved over the years (e.g., EX, GX, V, VMAX, VSTAR, and the current 'ex' cards)