Zaxara, the Exemplary {1}{B}{G}{U}
Legendary Creature — Nightmare Hydra
Identity
Sultai
EDHREC rank
#5,796
Cheapest printing
US$1.99
TCGplayer
Printings
3
Deathtouch
{T}: Add two mana of any one color.
Whenever you cast a spell with {X} in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it.
Keywords: deathtouch
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.