While not a direct one-to-one comparison, Arenas Explorer format is pretty close to the paper Pioneer format, and Pioneer Masters is here to bring the two even closer
The 2/4 Hero makes your Hero spells cost (1) less, and whenever you attack you look at the top four cards of your library and pull a Hero from among them into your hand
This makes him a pretty good card for gaining some lore, especially if you have other, bigger threats on the board
But that's exactly why I'm mentioning it
After Birds of Paradise, youll maybe consider Bloom Tender for decks with many colors, or maybe Ornithopter of Paradise if you want to get some attack triggers in Mardu colors
They may not be inherently powerful cards, but offer enough individuality that MTG and D&D fans will be after these