The presence of luck-based mechanics in a strategy game can be both a blessing and a massive frustration.

However, it still exists in subtle ways that can completely alter the outcome of a very close match.
Initial Deck Shuffling
The most prominent RNG element in card-based battlers is the initial four cards you are dealt at the start.

Once the initial hand is played, the rotation becomes fixed, and pure skill and memory take over.
Flexibility is a skill.Remove the guesswork from the mid-game.It prevents matches from feeling perfectly scripted. Troop Movement Quirks
Sometimes a unit will retarget unexpectedly due to a micro-movement by another troop, completely ruining your defensive setup.

To counter this, veterans always place defensive buildings in exactly the same specific tiles to guarantee consistent pulls.
Genre TypeRandomness ImpactAuto-BattlersLuck is the primary factor in individual matchesStandard Tower RushVery Low - Only the starting hand is randomized Accepting Randomness
The best competitors accept the chaos, focus on what they can control, and outplay the opponent regardless.

If you are stuck in a lower arena, it is because of your fundamental mechanics, not the random number generator.