In the second installment, well test against the same six criteria we used to crown Dominaria as a masterpiece: Balance, Power, Archetypes/Synergy, Replayability, Fixing, and Interaction
Once a creature that has reach because of Sphere Grid's last ability has blocked a creature, removing all +1/+1 counters from that creature or causing Sphere Grid to leave the battlefield won't cause that creature to stop blocking
You can give an indestructible counter to a creature thats attacking, you can proliferate, and you can move level up counters around, so theres plenty of interesting stuff you could do with Tidus
A common play is tutor up fatty, discard fatty and tutor up Phyrexian Delver, Phyrexian Delver targeting fatty
Im sure there will be people who disagree, but mono-blue Vehicles dont do it for me