It is not perfect spell timing, it is not deep deck-building knowledge, and it is not lightning-fast reflexes.

Playing the game without knowing how much elixir your opponent has is like playing poker without looking at the cards on the table.
The Economy of Aggression
Every single aggressive action you take in the arena should be dictated primarily by the opponent's current bank of elixir.

You create an advantage by making positive defensive trades (e.g., using a 3-elixir Arrows to kill a 5-elixir Minion Horde).
If they have 4 elixir, your tower is safe from a 6-elixir Rocket for at least 6 seconds.If they are at zero, they cannot immediately punish your 6-elixir Elixir Collector investment.It prevents 'over-defending'. How to Train the Skill
Tracking a constantly shifting number in your head while managing complex micro-interactions on the screen is incredibly difficult for beginners.

When they drop a heavy card, like a P.E.K.K. Should you beloved this information as well as you wish to obtain guidance relating to tower rush generously visit our web site. A (7 elixir), tell yourself "They are now Low Elixir."
The Match StageGeneration RateHow Hard it is to CountSingle Elixir (First 2 Minutes)1 Elixir every 2.8 secondsEasy to Moderate; plenty of time to calculate trades and track generation in your headDouble Elixir (Final Minute)1 Elixir every 1.4 secondsExtremely Difficult; the math changes so fast you must rely on instinct and 'feel' rather than raw numbers The Invisible Scoreboard
Tower health is a deceptive metric; you can have full tower health and still be losing the game if you are down 5 elixir.

When you perfectly predict an opponent's inability to defend your push based purely on your mental calculation, you will feel invincible.