Mardu Energy is a fast aggro deck that pairs early pressure from Ragavan, Guide of Souls, and Ocelot Pride with post-board Thoughtseize to strip your rituals before you can go off. Brotherhood's End cleanly sweeps their board of one- and two-toughness creatures, buying a critical turn to assemble your combo without racing through chump blockers. Orim's Chant is your premier combo protection — cast it on their upkeep to stop a Thoughtseize, or use it to end combat and prevent a lethal attack the turn before you storm off. Artist's Talent and the modal flip lands are trimmed because they're too slow in a matchup where speed and mana efficiency are paramount; Gemstone Caverns is cut because it becomes a liability against Thoughtseize if stranded in an opening hand without a second land.