Adventure idea: Awakening of Vitu-Ghazi:

Background:
Nissa Revane is a Joraga Zendikari elf and former planeswalker who wields magic to muster elves and elementals and amplifies their might.
To Nissa, planes are living beings inhabiting the Multiverse, not pieces that make it up, She can see the connections between all living things, and she believes these connections extend in a great pattern across the Multiverse. She can communicate with the souls of planes, and she sees it as her duty to convey their words to others who can't hear their voices.
During the War of the Spark, Vitu-Ghazi was animated by Nissa Revane into an enormous elemental that aided the troops fighting the Dreadhorde. Vitu-Ghazi was defeated by the God-Eternals when they first entered Ravnica. Rhonas tore out one of its arms and Nissa had to relinquish her control and the elemental collapsed. The fallen Vitu-Ghazi is now dormant.
Questline:
The Eternal armies advanced through the green parks and concourses surrounding the Selesnya guildhall- the living temple of Vitu-Ghazi. At the urging of the Planeswalker Nissa Revane, Vitu Ghazi rose from its long slumber and advanced on the Eternals. In the teaching of the Selesnya guild, Vitu-Ghazi was the center of the world and the locus of Mat'Selesnya, the Worldsoul, so Nissa neither gave it animating force nor controlled it. Rather, she awakened it and urged it to take action in defense of its world. In response, Vitu-Ghazi's elemental rampage scattered the Eternals and pushed them back to the Tenth District Plaza.
Nissa was at the center of the map, performing a magical ritual and communicating with the Vitu-Ghazi. Meanwhile, the Eternal army invaded the Selesnya territory and tried to interrupt her. Players will need to protect Nissa during the whole process. This is a defensive battle. All enemies will focus on Nissa and ignore the players. Players will have to heal her, buff her, and use as much crowd control as possible to delay the enemy attack. Once Nissa survived in certain turns, the Vitu-Ghazi would wake up and eliminate all Eternals in one strike.
Connect to other Selesnya maps to create a larger adventure:

Other variations of this map:
[All Patrons]Grid/Gridless version of the map
[Blood Witch]Blood Witch Map Collection
[Star Performer][Ring Master]Star Performer Map Collection