For example, Junkblade Bruiser's triggered ability is looking for you to spend your fourth total mana to cast spells during a turn
I like it when you can use a drawback to your advantage which is highly achievable with bounce lands, you can re-use your Teetering Peaks style lands or cycle off a Tranquil Thicket, you can turn on your Land Tax or abuse Cataclysm
In any shell you play Sorin the Mirthless with, hell provide a steady flow of unconditional card advantage to help you take over a game
However, Fire - our red card - deals two damage split between one or two targets at instant speed
Max speed is 4.) At the beginning of your end step, you draw X cards and lose X life, where X is your speed
Just like Llanowar Elves, this means it can be used to cast spells