Atraxa looks like a solid +1/+1 commander with some of the best commander colors avaible and really good stats, BUT there's no efficient combo with Atraxa who could win the game against 3 opponents nor does she provide you card advantage, where Zirda, the Dawnwaker for example is already one part of a efficient combo (Zirda + Basalt Monolith/Grim Monolith + a card like Walking Ballista), which makes it pretty easy to win fast with her as a commander
In addition, if either players Deck is emptied and said player cannot draw anymore, the outcome of the Duel is decided by the remaining Life Points
2 Warrior monstersIf this card is Link Summoned: You can add 1 Warrior monster from your Deck to your hand, but for the rest of this turn, you cannot Normal Summon/Set or Special Summon monsters with that name, nor activate their monster effects
Fighting results in a nonland permanent going back to its owners hand, whereas finding a crossing grants a creature +1/+0 until end of turn and stops them being blocked, too