Yasharn, Implacable Earth Modern Magic has no shortage of artifact tokens that sacrifice themselves
Pokmon TCG: Temporal Forces set has many Secret Rares that have beautiful artwork to accompany their powerful effects
17 Nikara, Lair Scavenger, And Yannik, Scavenging Sentinel Nikara, Lair Scavenger, and Yannik, Scavenging Sentinel are Mono-Black and Selesnya creatures respectively that have the partner ability, allowing them to be played together as an Abzan commander
You could say that the way to maximize Siphoner is to play with energy producers, which is true, but the other way to maximize Siphoner is to play with lots of cheap removal
In other words, a Pokemon will only lose 10 HP per turn regardless of how many times Poisoned is applied
Yep, your two mana card may be too slow