While troops and buildings form the physical foundation of your deck, spells represent your direct, unblockable influence over the battlefield.

Conversely, missing a heavy spell is the single fastest way to lose a match, instantly putting you at a massive elixir disadvantage.
The Heavy Hitters: Nuking the Arena
Every viable competitive deck must include at least one 'heavy' or 'medium' damage spell, typically costing between 4 and 6 elixir.

The Rocket and Lightning are incredibly expensive, high-risk nukes; they must be used carefully to secure massive positive elixir trades, usually by clipping a heavy unit AND the tower simultaneously.
Patience is key.Do not guess the math.Save it for their primary defensive anchor or support units. The Small Spells: Utility and Cycle
Cards like The Log, Zap, Giant Snowball, and Arrows are the primary tools for rapid swarm removal and fixing your hand rotation.

The Log is unparalleled for ground control, providing crucial knockback that resets the momentum of charging units.
Magic TypeOptimal ScenarioExamplesSmall Swarm Clear (2-3 Elixir)Instantly killing cheap swarms for a positive trade and quickly cycling the deckThe Log, Zap, ArrowsUtility / Displacement (1-3 Elixir)Physically moving enemy units to group them up for splash damage or pulling them to the King towerTornado, Freeze, Clone The Spell Portfolio
A well-balanced deck almost always features exactly two spells: one heavy/medium for structure removal, and one small for swarm control.

If your Golem is weak to Inferno Towers, bring Lightning and Zap.

For more on tower rush have a look at the web page.