It lets you target any creature on the battlefield, and when that creature dies, its controller draws a card and loses life
Each standard size sleeve is designed to hold one standard trading card
Turning creatures into bigger threats while drawing cards provides a powerful one-two punch of pressure and the ability to back it up with removal or additional threats
"Printable coloring page of a Charmander Pokmon card, authentic TCG layout with attack stats and description boxes, outlined only, no colors" "Outlined illustration of a Bulbasaur Pokmon card, real card template layout, detailed text box and border lines, perfect for coloring" An Eevee on a pokemon card, smiling and surrounded by hearts, pokemon card coloring page
The Life Point gain they bestow upon the opponent is trivial in exchange for running what is essentially a 37-card Deck