Terrasymbiosis performs best in strategies that place counters on multiple turns : including through combat, activated abilities, or modular effects
Lazav, the Multifarious is there to reach any creatures you may have milled while Devourer of Memory provides a low cost on field threat
These are the lists we can expect to see making a splash this weekend
An upcharge can be indicative of your card being of higher value than you anticipated, but is not always indicative of receiving a 10
Its possible its not quite good enough, but worth testing
The ability to convoke it means you just need to tap a few creatures to cast it for free, and with enough black Wizards from Final Fantasy lying around, you're likely going to do just that