After a senseless meltdown (from my son, not me) about not being able to find a really important GX (priorities right?), I decided it was time to take matters into my own DIY hands
My opponent tries chump-blocking, but it is too late
To tell if a Pokmon is valuable or rare, always check for rarity symbols, first edition stamps, holographic patterns, and special designations like SIR or alternate art
And with card advantage scarce outside blue at the time, Forbid succeeded as a pure control finisher and still does in Commander
For a more specific example, lets say you control an Etherium Sculptor and want to cast Mishra's Bauble, but your opponent controls Aura of Silence