The rate is reasonable and then you get an attack boost to your entire board for four turns in a row
If heads, your opponents Active Pokemon is now Paralyzed
Case 1: Our opponent has Batterskull in hand If we Stifle the Stoneforge Mystic trigger, we can shoot them for two with Grim Lavamancer, taking them down to six
When a Spell/Trap Card or another monster's effect is activated (Quick Effect): You can shuffle 1 face-up Pendulum Monster from your Extra Deck into the Deck, negate the activation, and if you do, destroy that card
Mirror Gallery is a valuable addition to any deck that relies on legendary creatures, as it allows players to have multiple copies of the same legendary creature on the battlefield without having to sacrifice them due to the legend rule
Mega Gengar's competitive viability was strong enough in the XY era to require regulation discussion in some formats