Celebration abilities are checking for past events, not the current game state
Having four copies of a card that costs eight ink risks you starting a game with cards you cant afford in your hand - its much better to swing the odds in your favour by having a greater number of cheaper cards and surviving long enough to play those big one-off powerhouses
The most well-known pairing that handles multiple aspects of this combo is Yawgmoth, Thran Physician, where Geralfs Messenger regularly finds a home
Theres something almost dualistic about this card, with the shadow across Sephiroths face breaking just enough for his small smile to show, and its enough to give you chills if youre familiar with the story
However, its real strength comes with its Ability Power Link
While you will need to inspect if these listings are genuinely NM quality, there are several indicators that this card can be had for below $100