"Commander ninjutsu [cost]" means "[Cost], Reveal this card from your hand or from the command zone, Return an unblocked attacking creature you control to its owner's hand: Put this card onto the battlefield tapped and attacking." Commander ninjutsu is a variant of ninjutsu that can be activated from the command zone as well as from your hand
These are available in Welcome Decks, Collector boosters, and the Marvels Spider-Man Eternal Spider-Man Scene Box only, which limits their supply (and raises their price tag, too!)
On top of hitting all lands it also wipes out all artifacts, creatures, lands, graveyards, and hands
Sorcery Color tag templates(None) Tivadar's Crusade Sorcery Color tag templates(None) Whelming Wave Return all creatures to their owners' hands except for Krakens, Leviathans, Octopuses, and Serpents
Something that I wanted to tackle with the new Rootha design and a blue-red spells deck was making it clear how to close out and end the game
You can argue if you want, but many games come down to the first person to land and keep a Primeval Titan, and his effect pushes you way ahead in mana as others scramble to answer him and catch up singlehandedly