This is the preconstructed version provided by the game in the “Community Spotlight: Gladiator” deck folder.
Decklist
Gruul Monsters
by MTG Arena Zone
Gladiator
best of 3
15 mythic
50 rare
8 uncommon
27 common
0
1
2
3
4
5
6+
Planeswalkers (3)
Creatures (46)
Instants (7)
Lands (38)
100 Cards
$393.13
Visual view
Gruul Monsters
Gladiator
by MTG Arena Zone
15 mythic
50 rare
8 uncommon
27 common
0
1
2
3
4
5
6+
❓ Importing and Copying Decks into MTG Arena
Source
MTG Arena Community Spotlight: Gladiator Event Guide and Decklists