Sliver Weftwinder is a commander option if you play Brawl on Arena, unfortunately, the pool of slivers on Arena is lacking
For example, there are Item cards such as Fiery Torch, Roller Skates, and even Paint Roller which can offer Item-based draw power
Having a Dragon enter under your control gives Sarkhan a +1/+1 counter and lets you make Sarkhan a Dragon on his own while giving him flying
Manifest was a protomorph where you were turning cards, even ones that didn't have morph, face down as colorless 2/2 creatures with a way to turn certain cards face up
Do you have a land search effect youre fond of, or one you think flies under the radar
Your best bet to pull it off is to play a commander like Selenia, Dark Angel that allows you to lose life on demand or have cards like Wall of Blood in play