In practice, this has a tremendous salutary effect in curbing the more broken possibilities
These are not officially confirmed by The Pokemon Company but are consistent across thousands of documented openings tracked by resources like The Trainer Court
Jund Package (Green/Red/Black, 22 cards, ~$13) Commander : SekKuar, Deathkeeper SekKuar doesnt get much love or respect around the Commander table, so he makes the perfect beginner Commanderno one will really get paranoid about you playing him until you start doing all sorts of fun and nasty things with him
During the Main Phase (Quick Effect): You can target 1 non-Dragon "Vanquish Soul" monster you control
Here's everything you need to know to begin on the right foot
Most interesting to me, though, are the many merfolk which can impact the game outside of combat using tap abilities or ETB triggers that are flashed in