That animation plays when that monster is summoned
That said, the condition of the card is integral in determining its value
Illustrated by Matt Stewart Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
It stipulates the creature must be legendary, but thats hardly a problem in Commander, where it sees the most play
Some examples of themes could be: Mechanic-Based Builds - All cards in the cube synergize with a particular mechanic, such as landfall flashback Tribal Themes - Built around tribes for each color (Zombies, Merfolk, Goblins, Eldrazi, etc.) Set Themes - A cube built using cards from particular sets and blocks in MTG (Innistrad, Kamigawa, Ravnica) Format-Themed Builds - For example, a Modern cube would feature only cards legal in Modern +1/+1 Counters Or Artifact Themes - Where most cards (regardless of color) synergize with the same thing Mono-Colored Themes - A cube built with a single color, using all the styles it offers There are no wrong answers here