At the bottom of our list is the Jund deck, which has one super-spicy and unique (but probably not very competitive) commander in Xantcha, Sleeper Agent (make infinite mana and kill someone by drawing cards!) and two uninspired legends
The difference is that Zegana wants one creature to be as big as possible regardless of how many there are, while Tishana wants as many creatures as possible without caring how big they are
Do you like RNG in Magic
As they get revealed, well update this article with complete decklists as well
If you need a bit more of a push to maximize your convoke triggers, you can play the Invasion of Segovia, which, when it flips to Caetus, Sea Tyrant of Segovia (a very impressive name for a 3/3 creature), it gives all your noncreature spells convoke, letting you bust out some combat tricks when you're normally tapped out
For the intervening if clause rule meeting the condition is as important as the trigger event itself