Éomer, Marshal of Rohan {2}{R}{R}
Legendary Creature — Human Knight
RedCommander: legal
Identity
Red
EDHREC rank
#5,638
Cheapest printing
US$0.36
TCGplayer
Printings
4
Haste
Whenever one or more other attacking legendary creatures you control die, untap all creatures you control. After this phase, there is an additional combat phase. This ability triggers only once each turn.
Keywords: haste
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.