Goblin Engineer could represent a strong utility card in artifact-based decks to tutor things like Ensnaring Bridge or Grafdigger's Cage, though it is a bit fragile to common removal spells in Modern and competes with Whir of Invention for a similar ability
Since most self-mill decks fill the graveyard to empty them later, these effects can cobble together a powerful value engine
For example, I think Metapod has a harden defense mechanism that helps you gain HP when its activated. Sean: You start your turn with drawing a card
That gives us a real picture of what players put in carts on day one, not just what looked flashy in previews
Here we see Clive become Ifrit, fighting an opposing creature and then making you loads of mana
Players can put a Pokmon card on their bench to prepare to replace their Pokmon - if theyre ever defeated or they decide to swap them out in exchange for making them vulnerable to attack from enemy Pokmon