"TCGplayer Infinite"
Gotcha - Whenever an opponent says "Deal" or "Damage," you may say "Gotcha" If you do, return Deal Damage from your graveyard to your hand
There would be an immediate dopamine rush to seeing Spike, Faye, Jet, and all the others on cards but I could just slap Spikes face on a Magic card with a bit of Photoshop and a proxy printer
Yes, on top of being reasonable extenders, these monsters each also boast an interactive effect, kind of like Therion (Coincidentally, another engine that might fit here)
Cons: As is fitting of a ninja, Greninja suffers when its not lurking in the shadows
Menace makes it easier to attack with this commander, but youll still probably want other ways to keep it safe so you can trigger its ability