Guarantee your spark by disabling the draw buttons.
(Not affiliated with Katelyn's Viramate.)
Sparkmate is a chrome extension that will remove your draw buttons in Granblue Fantasy to "stop" you from drawing on it.
Initially I made this small extension as a joke for my crew but it seems people are interested in it, so I'll keep trying to improve on it and checking how things are going. If you find any bugs please contact me on my twitter at @FrancisSaraiv
[As you know third party software is not allowed by Cygames in use with Granblue Fantasy, I am not responsible for any possible action to your account by Cygames during the use of this app.]
- fixed the extension disabling the wrong gacha buttons.