pokemon card combusken (45/127) [Platinum: Base Set] Weakness Water ×2 Resistance None None Retreat Cost Combusken 041 - Reverse Holofoil

The answer, as it is so often in life, is math

In particular, there is no way to cast this spell to stop a creatures ability that says At the beginning of your upkeep, When this creature enters the battlefield, or similar from triggering

NM cards are difficult to find, and their price matches, soaring to $179.99 for the best Bulbasaur card ever.

With black, you'll likely have some removal that will be able to deal with any threats during combat or reanimation to bring him back from the graveyard

Presumably the answer is: because people thought it might be reprinted in the current set

So the free trigger is scry 4