Every color and archetype has access to some kind of card draw engine, and there are hundreds of options in Eternal formats like Commander
cEDH decks leverage their high life total and extremely low-mana curve decks to draw some thirty cards while 20-life formats like Modern rely on cards like Angel's Grace to survive a negative life total No matter when this is used, expect it to be unfair
This lets you cast powerful creatures for a reduced cost, even if they must be sacrificed immediately
For Hedron crab, the target is a single player - but Ruin crab targets each opposing player
As stated above, if you have a multicolored deck that has green in it, my tip is to lean your manabase more towards green and use some of the spells found in The Best Green Ramp Spells guide to fix your colors
Its worth giving a quick nod to the beautiful Japan Showcase variants, which feature incredible anime-inspired art and a special Fracture Foil treatment