Big deck energy: How to build a Commander deck Originally, Companion cards could be played right from the sideboard, but this was deemed too powerful pretty early on, and the rules were updated a couple of months after Ikoria came out
New Phyrexia brought Karn Liberated, which was the first colorless planeswalker, requiring only generic mana to cast
After all of the triggered abilities resolve, each of the three token copies of Securitron Squadron will have four +1/+1 counters on it
attaching the effect to a creature that needs to survive a turn cycle and restricting the recursion to creatures makes the squirrel much less of a threat, but its still a formidable draw engine
South Wind Avatar Your creatures will inevitably die over the course of a game, and South Wind Avatar keeps your life total far from a finish line
Make your opponents whole deck into a certain color, and then Grindstone mills them out