Version 3.4 is a minor update to Bloons Card Storm v3.0. It introduced balance changes to address the aggro and OTK metas, particularly a large rework to Zee Jay and increased Quick Ready cost.
Zee Jay’s power level is definitely coming down but his early game burst, especially if he can get a ton of Bloontonium early (looking at you Bloontonium Cache) means his passive can be quite overwhelming. This is a big change but is being slightly offset by making his oft-forgotten middle ability a little better. — Update notes
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Passive Awesomeness: HP bonus changed ― +5 HP per Bloontonium (up to +50, includes gains from sent bloon) → fixed +20 HP
Rad Enhancements: Bonus AP increased ― +20 → +25
Adjusted description, but only changed "+5" to "+20" without removing mention of Bloontonium
Quick Ready continues to be a polarizing card. We still feel surprising damage is an important part of the game, but we do feel it needs a slight tweak (rather than a new design, which is something we’ve considered for another card instead). So we’re making it cost an extra gold. — Update notes
Quick Break is outshined by various other sources of healing these days, so we wanted to make it great again. A second charge should give it that much more staying power. — Update notes
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Charges increased ― 1 → 2
Descriptions
Update notes on Reddit
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Another small but meaningful balance change coming your way, we’re hard at work with loads of new content for 4.0, not much longer to wait now!
Passive Awesomeness: HP bonus changed ― +5 HP per Bloontonium (up to +50, includes gains from sent bloon) → fixed +20 HP
Rad Enhancements: Bonus AP increased ― +20 → +25
Delay increased ― 2 → 3