this will open up 5 spots, my suggestion is: 1 more Shape the Sands 4x Giant Growth or Titanic Growth SORCERIES Lose Incremental Growth, it's just too expensive to be useful in a deck that's not centered around counters, Phytoburst is weaker than Titanic Growth and similar cards, so I wouldn't keep it
It wasnt until Magic Origins that wed get Legendary Creature transform cards on the front side, with the origin cards of five Planeswalkers in the Gatewatch: Gideon, Jace, Liliana, Chandra and Nissa
You force them to spend multiple removal spells on the card before being able to damage you again, which results in huge resource losses for decks that heavily depend on them
Raid Bombardment
Here are some cards that, to me, definitively fall under the Stax banner: Stasis Winter Orb Static Orb Rising Waters Storm Cauldron Smokestack Words of Wind Back to Basics Drannith Magistrate Decree of Silence The Tabernacle at Pendrell Vale The cards above are all notorious for stopping a game from happening, either through not allowing lands to untap, making it prohibitive to play creatures (the formats defining way to play), or by stopping you from playing your Commander (which is the point of the format, whether you like it or not)