They are heavily played and beloved in formats from 20 life Standard to 40 life Commander
Incapsula incident ID: 1848000720969170764-504759537592963628
It can be anything, from changing up my wardrobe to something silly and clashing and obtuse, to banning me from using a set of cards, or an archetype, or forcing me to do something like play with 60 cards in my deck
Shamarun Cloner [DARK] LV 3/Reptile/Effect ATK/600 DEF/1400 During the Main Phase: If this card is in your GY, you can Special Summon this card from your GY to your opponent side of the field, and if you do, Special Summon up to 3 Shadslime Token to your side (DARK/Reptile/LV 2/ATK 0/DEF 100), also, if this card leave the field after used this effect, banish instead
See also: Binder layout planner How should I organize SM - Burning Shadows in a binder? For 299 cards (including reverse holos), a 9-pocket binder needs 17 double-sided pages and a 12-pocket binder needs 13 pages