The new Rundvelt Hordemaster from Dominaria United helps the deck’s resiliency and attacks from a lot of different angles. You can go wide and attack using cards like Battle Cry Goblin and Rundvelt Hordemaster to boost your whole board, you have great reach since you can drain the opponent out with direct damage using Sling-Gang Lieutenant and Pashalik Mons, and you have Muxus, Goblin Grandee which essentially acts as a one card combo.
Guide
Decklist
Rakdos Goblins
by Altheriax
Historic
best of 3
0 mythic
37 rare
16 uncommon
7 common
0
1
2
3
4
5
6+
Creatures (31)
Enchantments (4)
Lands (25)
60 Cards
$344.82
Sideboard
15 Cards
$88.07
Visual view
Rakdos Goblins
Historic
by Altheriax
0 mythic
37 rare
16 uncommon
7 common
0
1
2
3
4
5
6+
❓ Importing and Copying Decks into MTG Arena
Source