Ezuris main drawback is his size and inability to regenerate himself, but when your upside is so high, the downside just doesnt seem so bad
With Pongo, 'Old Rascal and Peter Pan, Never Landing, you can stick cards on your board early and generate lore unchallenged, every single turn
The original iteration of companions came with Ikoria: Lair of Behemoths, and on release they were placed in the sideboard and could be immediately put into play from there by paying the companion's mana cost
Stat-wise, its decent: a 4 mana casting cost and another two mana to put it on
Then if that was at least three
If you put a Trickster's Elk on an opposing creature to shrink it down to a 3/3, and then the creature dies later on, you are the one left with the original 3/3 Elk on the battlefield, not your opponent