Extradimensional Crisis wont make huge shifts to the meta like Celestial Guardians did, but it does elevate some decks into a more comfortable spot, maybe even pushing them into meta relevant status, all while offering plenty of support for existing decks
Master of the Wild Hunt and new Masticore are both a little harder to get value from as it doesn't always happen when they resolve or die and are primarily just threats however they each do important other roles beyond this that Dungrove Elder does not offer
Regarding early Japanese official tournaments held in 1997, PSA notes that tournament documents indicate 4 copies of each placement card were awarded
To upgrade it , you can first get one Perlereino (and add Terraforming) and then add three TKash, then the two other Field Spells
You can also protect your own combos using this card as a Dispel
When I read the improvise mechanic, my mind immediately went to Howling Mine