Game: https://www.kongregate.com/games/DJStatika/warlords-heroes

Buying adds money
96 02 00 08 02 1c 0b 4f
96 02 00 08 02 1c 47 4f

Invulnerability
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96 0b 00 08 0d 06 01 00 00 00 00 00 00 00

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96 04 00 08 00 08 00 1c 02

No Flashing Invulnerability
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96 09 00 08 01 07 07 00 00 00 05 01

Credits go to various people