Our next Optional Quest in Monster Hunter World Iceborne is the Master-Rank Quest, Fools Mate. This sees us back into the Ancient Forest to hunt a Rathian.
Our next optional quest in Monster Hunter World is Pretty In Pink. We're headed to the Wildspire Wastes to hunt a Pink Rathian. You've already fought a Pink Rathian before so she shouldn't be much of a surprise by now. Remember that she likes to do multiple backflips in a row and carries additional armor plating over weak points compared to the regular variant.
Our next optional quest is Brown Desert Green Queen in Monster Hunter World. We're off to the wildspire waste to hunt a Rathian, the female counterpart of Rathalos.
Our next optional quest is the Sleeping Sylvan Queen in Monster Hunter World Iceborne. We're off to the Ancient Forest to hunt a High-Rank Rathian in this optional quest. To unlock this quest you'll need to encounter a Rathian in a High-Rank quest or expedition, so bare that in mind if it's not showing up for you.
Our next Assignment Quest in Monster Hunter World is "Old World Monster In The New World". You unlock this quest once you have gathered enough of the "??? Rathian" tracks while out in other quests or on an expedition.