Whirlwind

Whirlwind is an Attack card for the Ironclad. It spends all remaining Energy points and attacks each enemy for 5 damage for every Energy point spent. As an Uncommon card, it appears as a reward for combat, although less often than Commons.
Upon upgrade, each hit deals 3 more damage.
==Interactions==
*As a multi-hit attack, it benefits highly from so long as more than 1 Energy is used.
*Although using it with 0 Energy will have no immediate effect, it still counts as an Attack card played.
*If duplicated with , , , or (If X is 2 or greater), the value of X will be preserved for the copied card.
* allows for Whirlwind to deal damage 2 more times, even if no Energy is used to play it.
*When unupgraded against single enemies, it is better to use Strikes than burn all your energy on 5 damage instead of 6. This can make Whirlwind a card you might want to upgrade sooner.
==Update History==
*Weekly Patch 46: Adrenaline
**Adding VFX for Whirlwind card.
*Weekly Patch 42: Reboot
**Adding SFX for Whirlwind card + Guardian enemy.
**Updating SFX for Whirlwind (card AND Guardian enemy).
*Weekly Patch 40: Forethought
**Whirlwind card gets an additional SFX.
*Weekly Patch 27: Hello World
**Fixed issue where playing cost X cards quickly after energy gain cards failed. Offering -> Whirlwind
*Weekly Patch 10: Quality of Life
**Removing 'Spend all [R].' from all X-cost cards for consistency.
**Fixed bug where cost X cards do not work with energy gain cards if played too fast.