If you see a problem, you can often go back and edit your design before submitting it

Purphoros, God of the Forge Zerg Purphoros, God of the Forge Illustration by Eric Deschamps Commander (1) Planeswalkers (3) Chandra, Acolyte of Flame Chandra, Awakened Inferno Zariel, Archduke of Avernus Creatures (36) Beetleback Chief Brash Taunter Chandra's Incinerator Conspicuous Snoop Dockside Extortionist Goblin Chainwhirler Goblin Chieftain Goblin Chirurgeon Goblin Cratermaker Goblin Diplomats Goblin Goliath Goblin King Goblin Matron Goblin Ringleader Goblin Tinkerer Goblin Trashmaster Goblin Warchief Goblin Wizard Hobgoblin Bandit Lord Kiki-Jiki, Mirror Breaker Krenko, Mob Boss Krenko, Tin Street Kingpin Legion Warboss Magus of the Moon Mogg Mob Moria Marauder Muxus, Goblin Grandee Pashalik Mons Quakebringer Siege-Gang Commander Skirk Prospector Squee, the Immortal Sunspine Lynx Terror of the Peaks Torbran, Thane of Red Fell Treasonous Ogre Instants (3) Chaos Warp Flare of Duplication Valakut Awakening Sorceries (4) Goblin Offensive Release the Gremlins Shatterskull Smashing Vandalblast Enchantments (8) Aggravated Assault Blood Moon Experimental Frenzy Fable of the Mirror-Breaker Goblin Bombardment Impact Tremors Lifeline Roiling Vortex Artifacts (11) Arcane Signet Fellwar Stone Gauntlet of Power Icon of Ancestry Mox Diamond Phyrexian Altar Ruby Medallion Skullclamp Sol Ring Vanquisher's Banner Wayfarer's Bauble Lands (34) Bonders' Enclave Den of the Bugbear Goblin Burrows Kher Keep Mountain x29 Three Tree City Purphoros, God of the Forge is an incredible commander for a few reasons

In this case, we just had a tier 0 deck on a power level above all others
Compared to Force Spike it is harder to read if they have a Daze in hand or not, they never need to leave mana open to be able to cast it and are able to tap out with impunity
This rating is assuming that you have some big dinosaurs for this to see, but its still a reasonable inclusion to kill cheap creatures if you dont have those
As long as you can consistently hit a decent-sized creature and make sure that the combat trick aspect of the card gets value, its hard for Yunas Whistle to be anything worse than good