With Wrenn and Realmbreaker out, your lands all tap for any color of mana, giving you all the colors of mana you need to cast your spells
Kuldotha Forgemaster - Tinker on a body
For reference, before the tax was added to the Companion mechanic, as long as you upheld the deckbuilding restriction that the Companion requested, you could add your Companion from the Companion zone (your sideboard) to your hand at no cost essentially allowing you to begin the game with a guaranteed extra card in hand
It is always Tier 1 in the hands of an experienced player but never too dominant to become problematic
Theyre mostly multicolored legendary creatures with varying combat stats, unique abilities, and they usually revolve around themes from their color pairings
Regardless of whether you are more aggro or controlling, they should be in your deck