A bunch of cantrips that target a creature, creatures with enter the battlefield effects and cards like these: Top left to bottom right: - Dismiss into Dream: On itself it is for sure a solid card but once you combine it Ink-Treader stuff gets real
Modern Horizons 2 is designed for the Modern format, which lets you play with cards from all the way back to 2003, meaning the power-level is through the roof
However, in such a case, it then feels fitting that the one exception would be one of the oldest and most iconic cards in Magics history
Emerald Dragon is a great example of how to give card advantage without drawing cards, though Id argue that white deserves it more and has the more playable version in Crystal Dragon
Aside from a few Dinosaurs here and there though, the tribes of Ixalan are notably absent from Standard
Pin trading is the same way, as was Sorcerers of the Magic Kingdom