mtg card font At the beginning of each players draw step Font of Return

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

The reason its above the others on the list is that its part of an obnoxious combo with Kiki-Jiki, Mirror Breaker

Derevi, Empyrial Tactician Derevi, Empyrial Tactician breaks one of the fundamental rules of Commander: commander tax

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

Other options may not exactly combo with themselves, but the other combo pieces needed are so generic that it might as well be a 1-card combo

Mirabel Madrigal's Family Gatherer card is powerful but requires strategic planning for lore victory