Attuma, Atlantean Warlord {2}{U}{U}
Legendary Creature — Merfolk Warrior Villain
BlueCommander: legal
Identity
Blue
EDHREC rank
#11,446
Cheapest printing
US$0.28
TCGplayer
Printings
1
Other Merfolk you control get +1/+1.
Whenever one or more Merfolk you control attack a player, draw a card.
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.