Whenever another permanent you control is put into a graveyard from the battlefield, if it had one or more counters on it, you may put that number of +1/+1 counters on target creature
Hes found a permanent home in my God-Eternal Kefnet deck for sure
Arcee, Sharpshooter Assembled Ensemble Codsworth, Handy Helper Dockworker Drone Dragon Man, Reformed Robot Goldbug, Humanity's Ally Guidelight Synergist Impounding Lot-Bot Interface Ace Kilo, Apogee Mind Liberty Prime, Recharged Magitek Infantry Mechanized Ninja Cavalry Megatron, Tyrant Mendicant Core, Guidelight Nesting Bot Optimus Prime, Hero Patrolling Peacemaker Prowl, Stoic Strategist Ratchet, Field Medic Rex, Cyber-Hound Robo-Piata Securitron Squadron Sentry Bot Soundwave, Sonic Spy Starport Security T.A.P.P.E.R
Esper: Probably the easiest way to upgrade the Esper deck is to add in cards like Sensei's Divining Top and Scroll Rack to support the top-of-the-deck theme