You can also pour infinite mana through Memnarch to take everything your opponents own
Niche cases, sure, but they will happen
Niko, Light of Hope Niko, Light of Hope is a 2/3 human wizard that already makes two Shards, which are upgraded enchantment Clue tokens
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Serah Farron's last ability checks at the moment it would trigger to see if you control two or more other legendary creatures
Shadow of the Second Sun is huge here, as you can get your commanders benefit right after casting the Shadow, as is Portal to Phyrexia to undo whatever benefits your opponents obtained