Keeping it simple, each Pokmon that you play is a specific type, has a set amount of hitpoints, and has different types of moves that it can use
Standard is very harsh on 1-2 drops at the moment and Jackdaw Savior is a way get some value by regrowing those early drops when they kill your later creatures and grinding into the mid-late game
Or freeze down your opponent's attackers so that you get through two whole turns of free questing without the stress of losing your high lore cards
Why play Batterskull and some generic control filler when you can load up on Wurmcoils, Titans and planeswalkers
(It can't be the target of spells or abilities.) Equip Artifact - Equipment Color tag templates(None) Mana Crypt At the beginning of your upkeep, flip a coin
After this, all other opponents must each decide whether to discard a card or allow the player to place a Construct, Robot, or Vehicle card onto the battlefield from their hand