Prime Speaker Vannifar {2}{G}{U}
Legendary Creature — Elf Ooze Wizard
Identity
Simic
EDHREC rank
#7,270
Cheapest printing
US$9.14
TCGplayer
Printings
1
{T}, Sacrifice another creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery.
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.