This is fine, but it does make these decks more susceptible to board wipes and removal
Rather than increasing the mana requirements to cast spells, they impose a pretty hefty penalty on people that want to cast spells
But, of all of those that fall into that category, which are the most valuable
For anyone trying to cast Brainstorm, for example, Chalice can dominate the game and leave you unable to cast spells
First, we choose to apply Thromok's replacement effect -- but it doesn't sacrifice the creature yet because it hasn't entered the battlefield
Barret, Avalanche Leader + Chishiro, the Shattered Blade Barret, Avalanche Leader and Chishiro, the Shattered Blade are effectively the same card: Theyre legends that reward your equipment with creature tokens, a relatively tame but effective way to make a green commander that cares about equipment