Understanding these allows you to anticipate an opponent's strategy and identify your own deck's fundamental game plan
Similarly, creatures that enter the battlefield attacking but werent declared as attackers wont increase the number of rad counters they get
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)
Dusknoir is another Stage 2 Pokemon whose Ability Shadow Void allows them to transfer any damage from another Pokemon onto themselves
Determining which sets are the most valuable can be a little tricky since prices tend to fluctuate regularly
This is not a rule, mind you