Bungie, in the future stop the random drop for the exotic raids.
Or otherwise, insert a logarithm that increases the possibility of obtaining the weapon, each time the raid is completed without obtaining the weapon ... like in the nightfalls.
Bungie please listen to us.
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The "Like in nightfalls" is what bothers me. I have done the inverted spire nightfall like 200 times without getting the multicolor ghost.