A one-to-one ratio of mana-to-card-draw is about as good as you can get, short of Ancestral Recall
I have named it the fifth best card ever printed for multiplayer

Semi-Limited Effect Monster cards in Master Duel Adamancipator Analyser Altergeist Multifaker Aluber the Jester of Despia Blaster, Dragon Ruler of Infernos Destiny HERO - Malicious Dimension Shifter Genex Ally Birdman Labrynth Chandraglier Labrynth Stovie Torbie Luster Pendulum, the Dracoslayer Lyrilusc - Cobalt Sparrow Kashtira Unicorn Necroface Parallel eXceed PSY-Framegear Gamma Purrely Snake-Eye Ash Souleating Oviraptor Spright Blue SPYRAL Quik-Fix Superheavy Samurai Wagon Tearlaments Scheiren Thunder Dragonroar Water Enchantress of the Temple Semi-Limited Synchro Monster cards in Master Duel Trishula, Dragon of the Ice Barrier Semi-Limited Spell cards in Master Duel Called by the Grave Chaos Space Change of Heart Cynet Mining Divine Wind of Mist Valley Emergency Teleport Fusion Destiny Infernity Launcher Kashtira Birth Mask Change II Nadir Servant Quick Launch Raigeki Rite of Aramesir Runick Freezing Curses Runick Slumber Runick Tip Sekkas Light Sky Striker Mobilise - Engage

Again, the early sets were not numbered
negate the activation, and if you do, banish that card, then your opponent banishes all cards with its same original name from their hand and Deck
Leela, Sevateem Warrior seems like a good Doctors companion that will grow each time an opponent decides to draw an extra card from your commander