yugioh each time a spell card is activated Mythical Beast Medusa - EXFO-EN024 Super Rare Magical Abductor - Yugipedia

By linking your system to someone else's, once per person, and doing "Card Pop!", each of you gets one random card

For example, say you control Collective Inferno and you attack an opponent with a 5/5 creature of the chosen type with trample and haste

Collecting March of the Machine: The Aftermath During the events of March of the Machine , Archangel Elspeth struck at the heart of Elesh Norn's invasion and defenders across the Multiverse fought back against the inexorable tide of Phyrexian invaders

With the alternate casting cost, it's a good way for a blue deck to set itself back permanently in the land race

Again, pen and paper will be useful here