I've asked multiple people at different gamestores, but found no clear reasoning so far, so I get the sense it's more of a gut feeling than a clear calculation
The active player - the person whose turn it is - has priority, which means they add their card to the stack first
Based on the latest market prices tracked on TCG Stacked, Arcanine is worth about $0.10 USD
Sure, some Johnny somewhere will have a deck with a bunch of ETB triggers for Snare and friends to exploit, but until then, these are too much cost, for too little results
Legendary Creature - Human Knight Commander (CTRL to add secondary) Anthem Anthem (CTRL to add secondary) Counters Counters (CTRL to add secondary) Discard Discard (CTRL to add secondary) Draw Draw (CTRL to add secondary) Land Land (CTRL to add secondary) Lifegain Steel Seraph Prototype 3/3 (You may cast this spell with different mana cost, color, and size