Thanks to an errata, Walls cant attack was changed to Defender, so all of your Walls will trigger Arcades draw effect
Blacks earliest mana ramp cards were mana accelerators, cards that gave you a one-time mana boost either unconditionally or in exchange for doing something like sacrificing a creature
Lightning Greaves Lightning Greaves is one of the most powerful cards in the equipment department because of its equip cost
My first question for players stuck at square one like this is can you simply become less reliant on your commander? Ultimately, its very hard to keep your commander on the board if everybody else wants them gone, and if your deck doesnt function without that creature, your opponents will be tempted to shut them down as soon as you pick up steam
On the other hand, the Instants offer some great support by Bile Blight killing a board of tokens (this will obliterate Tyranid players), Dark Ritual helping to cast things earlier in the game, and Brainstorm helping you smooth out future turns