Very common in red EDH decks and capable of making some inroads in Legacy, Legion Warboss helps to widen your board the moment you play it, and then mentors and buffs your weenies as soon as it can join the fray
If my opponent's leg is touching one of the table legs, does it count

Rime #36 - Remoraid #37 - Octillery #38 - Corphish #39 - Crawdaunt #40 - Empoleon V #41 - Frillish #42 - Jellicent #43 - Bruxish #44 - Electabuzz #45 - Electivire #46 - Shinx #47 - Luxio #48 - Luxray #49 - Pachirisu #50 - Tapu Koko V #51 - Tapu Koko VMAX #52 - Yamper #53 - Boltund #54 - Galarian Slowpoke #55 - Spoink #56 - Grumpig #57 - Baltoy #58 - Claydol #59 - Chimecho #60 - Espurr #61 - Meowstic #62 - Mimikyu V #63 - Necrozma V #64 - Dottler #65 - Orbeetle #66 - Mankey #67 - Primeape #68 - Onix #69 - Cubone #70 - Marowak #71 - Gligar #72 - Gliscor #73 - Timburr #74 - Gurdurr #75 - Conkeldurr #76 - Mienfoo #77 - Mienshao #78 - Rolycoly #79 - Carkol #80 - Coalossal #81 - Silicobra #82 - Sandaconda #83 - Falinks #84 - Stonjourner #85 - Single Strike Urshifu V #86 - Single Strike Urshifu VMAX #87 - Rapid Strike Urshifu V #88 - Rapid Strike Urshifu VMAX #89 - Zubat #90 - Golbat #91 - Crobat #92 - Galarian Slowbro #93 - Murkrow #94 - Honchkrow #95 - Houndour #96 - Houndoom #97 - Tyranitar V #98 - Morpeko #99 - Steelix #100 - Mawile #101 - Bronzor #102 - Bronzong #103 - Pawniard #104 - Bisharp #105 - Honedge #106 - Doublade #107 - Aegislash #108 - Aegislash #109 - Corviknight V #110 - Corviknight VMAX #111 - Spearow #112 - Fearow #113 - Lickitung #114 - Lickilicky #115 - Glameow #116 - Purugly #117 - Stoutland V #118 - Bouffalant #119 - Drampa #120 - Indeedee #121 - Bruno #122 - Camping Gear #123 - Cheryl #124 - Energy Recycler #125 - Escape Rope #126 - Exp

As always audience experiences will vary
This represents a first turn Serendib Efreet, followed by a second turn Serendib or more, depending on if another mana source is found in the first couple of turns
Seething Song is regularly used in lower powered red decks for example, as it lets you get a threat out sooner