Probably you are catching whatever creature that appears around you, but you have definitely heard people saying some jargons like rare Pokmon evolve that Pokmon Pokstop hatch the egg up level curve ball whats your team battle at gym revive/potion but Whats all that
I avoid these in Commander decks since they need to be in your opening hand to be effective
At seven mana, Beledros is a little pricey, but isnt the worst for a green deck
Its also worth noting that unlike Creature Swap (a similar card that allows you to swap any of your Monsters for an opponents), Creature Seizure doesnt prevent you from changing the battle position of the Monster your opponent gives you
Depending on your deck: If you obtained a trap, awesome- after a few dragons and thunders in your deck, you can probably start the A-tec strat against Pegasus for Megamorph/Bright Castle
Heres how BGP is explained: [Imagine] a group of generals of the Byzantine army camped with their troops around an enemy city