The resolution of the effect creates a wraith, then checks your total wraith count
Theres already a whopping 16 mainline Final Fantasy games, and dozens of spin-offs released across decades
The player character is the first person to ever give him a challenge which leads to him becoming utterly obsessed with fighting them to the death, to the extent that he fuses himself with a dragon spirit and orchestrates a world-ending catastrophe just to bait you into fighting him. Mechanically, Zenos yae Galvus is a double-faced card that can trasnform into Shinryu, Transcendent Rival
Admittedly, with four opponents, this is much more difficult in Commander, and even competitively, its often more trouble than its worth
Esper Sentinel can draw up a handful of cards each turn cycle in EDH, provided that your opponents are playing spells and arent paying their taxes
Summoning: Materia is Green's answer to "how do I get consistent card advantage without drawing?" and it plays beautifully with any deck that wants to curve out into beefy creatures off the top of the deck