Pioneer generally lacks explosive early-game starts, and Arcbound Ravager would open up faster decks in the longer run
There are ways around that, using cards like Squee, Goblin Nabob to discard meaningless cards or using other tricks like Stroke of Genius to draw extra cards that you can use to pay, but most people who played the Masticore played it fairly
Legacy: Oath was an Extended monster for as long as R&D let us play it, probably the chief rival to even more broken strategies like Trix and Tinker at their heights
But if we can find a home for it across multiple packets then we could print more versions and itd stay true to our rules of rarity. So, as a low power card with an ability that triggers on death, Nocturnal Feeder works well for the Minions packs, but by giving making it a Vampire and Rogue type, Wizards were also able to slot into those themes, too
The Ready half will make your critters indestructible for the turn and untap them