Silverquill, the Disputant {2}{W}{B}
Legendary Creature — Elder Dragon
Identity
Orzhov
EDHREC rank
#7,465
Cheapest printing
US$1.43
TCGplayer
Printings
3
Flying, vigilance
Each instant and sorcery spell you cast has casualty 1. (As you cast that spell, you may sacrifice a creature with power 1 or greater. When you do, copy the spell and you may choose new targets for the copy.)
Every printing
highest TCGplayer market first; a card with only a thin single listing shows its low
In short
A Commander deck is a commander and 99 other cards, one copy of each (except basic lands), all inside the commander's colour identity. Paste a full list into the deck price calculator to price it and check it against the format.