A spell or token with changeling is just as much an Elf, a Dwarf, a Sliver, a Goat, a Coward, and a Zombie as it is a Shapeshifter
Now that youve got The Aetherspark attached, you can start ticking up the planeswalker, both through its +1 ability to give a creature a +1/+1 counter, and then dealing damage with an equipped creature also adds loyalty counters to it
As for Necron Dynasties, youll need to find it on the secondary market these days, but the mono-black deck was already plenty powerful already
Toshi's Safari | Commander | Abe Sargent Commander (1) 1 Toshiro Umezawa Creatures (17) 1 Burnished Hart 1 Crypt Ghast 1 Doom Whisperer 1 Erebos, God of the Dead 1 Geth, Lord of the Vault 1 Gonti, Lord of Luxury 1 Gray Merchant of Asphodel 1 Harvester of Souls 1 Liliana's Shade 1 Liliana's Specter 1 Nirkana Revenant 1 Noxious Gearhulk 1 Pontiff of Blight 1 Rune-Scarred Demon 1 Shriekmaw 1 Stinkweed Imp 1 Tomb Robber Planeswalkers (2) 1 Liliana of the Dark Realms 1 Sorin Markov Instants (26) 1 Crypt Incursion 1 Dark Bargain 1 Empty the Pits 1 Entomb 1 Expunge 1 Geth's Verdict 1 Grim Return 1 Hero's Downfall 1 Malicious Affliction 1 Mausoleum Secrets 1 Necrologia 1 Price of Fame 1 Scour from Existence 1 Spoils of Blood 1 Succumb to Temptation 1 Sudden Spoiling 1 Tendrils of Corruption 1 Thrilling Encore 1 To the Slaughter 1 Tragic Slip 1 Treacherous Urge 1 Undying Evil 1 Vampiric Tutor 1 Without Weakness 1 Word of Command 1 Wretched Confluence Sorceries (4) 1 Culling Sun 1 Entreat the Dead 1 Final Parting 1 Profane Command Enchantments (3) 1 Grave Pact 1 Phyrexian Arena 1 Underworld Connections And there's the deck
Technically the term comes from the original Vintage deck titled $TK4S (The Four Thousand Dollar Solution) by Scott Lemenager
Each allows to do something with the game before it starts
