With the effect of Bead Beast Argozaurus, you can destroy a Dinosaur monster in the hand or on your side of the field, to add a Sea Serpent monster with the same Level as the destroyed monster or an Evolution Pill card from your Deck to your hand
A field of 5 monsters can easily go into strong Synchro, Xyz, or Link plays depending on the deck, and you wont even need The Legendary Defenders instant win condition as decks with 5 monsters can easily reach a game-ending board
Each pack has a 1:10 chance of including a rare Booster card
7 Pokmon Breeder These days it's uncommon to run anything more than a Basic or Stage 1 card
Either decision ends up benefiting the player with Esper Sentinel, making the card a nightmare to play against for these decks
Mounts are terrible, so we wont talk about them anymore, but the difference between station (specifically stationing spacecraft) and crew deserves a little thought