Attacking an opponent with a 30/30 legendary creature possessing trample, double strike, and lifelink is not unusual in a Commander game with Dogmeat, Ever Loyal
However, there are caveats
If you flip a second Illuna, you can add it to hand and then mutate it onto the first one for a double trigger (and no legend rule!) Its harder to see exactly what to do with Vadrok, Apex of Thunder , since one of the best spells in Jeskai to recast Deafening Clarion will also kill Vadrok unless you mutate it under something with better stats
Even within the Champions block, that's awfully narrow, and in Magic as a whole, it is hopelessly irrelevant
It just oozes value
Mirabel Madrigal's Family Gatherer card is powerful but requires strategic planning for lore victory