Also this "legend rule doesn't apply" is getting so common
Considering you've just cast your Zacama, you can bet you'll have nine mana worth of lands in play, which means you could activate any of the three, up to three times, colored mana permitting
If youre fighting against Lightning Pokmon, you can pretty easily pivot away from Dondozo and use Stonjourner instead, powering it up with Tatsugiris Mise en Place, and then using Dondozo as a backup
Mari, the Killing Quill Mari, the Killing Quill cares about assassins, mercenaries and rogues, and theyll all have deathtouch, so theyre harder to block
Your deck does a lot of things
A Voltron deck is one that seeks to eliminate opponents by killing them with one creature (usually your commander since you only need to deal 21 damage with it to kill an opponent)