Any untap effect you could use on a creature to make it pay for convoke cant be activated since abilities like that need to be activated either before or after paying a spells mana cost
After years of waiting, next month Magic: The Gathering will release one of its most highly anticipated sets, and arguably one of the most significant additions to Magic in years: an entire Final Fantasy -themed expansion drawing together decades of one of the most venerable video game series of all time with one of the most venerable card games of all time
Gwenom, Remorseless Bolas's Citadel in the command zone seems like itll make Gwenom, Remorseless a kill-on-sight commander
In the worst-case scenario, it dies and you get to recast it as soon as you have a second zombie in play
You may want to consider Shorikai, Genesis Engine as an alternative Vehicle-centric commander
Whenever you expend 4, you gain 3 life