Toshi Isn't an Alternate Cost - You will need to still use your mana for the instant, you don't get it for free when you jump through these hoops
Ruby cards will offer benefits to players that enjoy taking control of the battlefield and ensuring that their opponents struggle to keep their characters on the table
Then, the ultimate on this card will most assuredly cause your opponent to lose the game
There are obviously strictly better versions (Hero's Downfall, Breathe Your Last), but Murder's a classic

Amoeboid Changeling Avian Changeling Barkform Harvester Belonging Bloodline Pretender Cairn Wanderer Chameleon Colossus Changeling Berserker Changeling Hero Changeling Outcast Changeling Sentinel Changeling Titan Changeling Wayfinder Chitinous Graspling Chomping Changeling Feisty Spikeling Fire-Belly Changeling Flock Impostor Game-Trail Changeling Gangly Stompling Ghostly Changeling Gladewalker Ritualist Graveshifter Guardian Gladewalker Impostor of the Sixth Pride Irregular Cohort Littjara Glade-Warden Littjara Kinseekers Masked Vandal Mirror Entity Mischievous Sneakling Mistwalker Moonglove Changeling Moritte of the Frost Morophon, the Boundless Mothdust Changeling Mutable Explorer Omni-Changeling Orvar, the All-Form Prideful Feastling Realmwalker Rooftop Percher Shapesharer Sizzling Changeling Skeletal Changeling Taurean Mauler Three Tree Mascot Turtleshell Changeling Universal Automaton Unsettled Mariner Valiant Changeling Venomous Changeling War-Spike Changeling Webweaver Changeling Woodland Changeling

His philosophy of "Hulk Smash" is more of a red plan than a green plan