Every last one of the above creatures were good in limited, so having a creature which kills them all (and flanks itself to boot) would be considered gravy on the boat
+4x Jafar - Royal Vizier -2x Beast - Forbidding Recluse, -1x Merlin - Shapeshifter +3x Jafar - Dreadnought Early Game Amethyst decks with the bounce package generally want to be aggressive or controlling, but control decks are usually filled with expensive legendaries
Urtet, Remnant of Memnarch The best myr commander, Urtet, Remnant of Memnarch makes your myr so much better
Toph, Greatest Earthbender (Gruul) While shes excellent in the 99, Toph is also an intentionally clever commander
However, Broodscale Combo players often include [card]Duress[/card] and [card]Tamiyo's Safekeeping[/card] to protect against that approach
Once during the game, you may cast your chosen companion from your sideboard