Official starter
Rumble, Mechanized Menace
How to play Rumble
Rumble's deck is all about mechs. Each new one gives all your other mechs a new bonus.
Play a mech, hold a battlefield, and let the board grow. Going first, conquering turn two with a mech leaves a 3-Might defender that their 2-cost unit does not want to contest. Then snowball: more mechs, more bonuses, more points.
Think of it this way: each cog in the machine makes your engine more powerful, until even the dinkiest clunker can become arena champion.
Sources: Rumble, Mechanized Menace guide — Riftbound.gg · Spiritforged Precons: Fiora & Rumble