If Path of Ancestry's last ability produces two mana (most likely due to Mana Reflection), spending those two mana to cast creature spells that share a creature type with your commander will cause two abilities to trigger
Keep him on the board long enough, and Vivi becomes a powerful attacker in his own right, but his real value lies in the win conditions you can create with the killer combination of free mana and pinging
Arixmethes's triggered ability resolves before the spell that caused it to trigger, but after targets have been chosen for that spell
This is one of my favorite cards for how all the pieces came together
Legendary Creature Eldrazi
Emperador Gestahl Set Number 282 Language Espaol Legal Formats Brawl, Commander, Competitive Brawl, Legacy, Timeless, Vintage Not Legal Formats Alchemy, Modern, Pauper, Pioneer, Standard Rulings (9/19/2025) If a card in a graveyard has in its mana cost, X is 0