Missing sideboard cards? The full 15-card sideboard runs about $37.83.
Buy sideboard on ManapoolMono-Green Eldrazi grinds with Sowing Mycospawn and Kozilek's Command while building toward Emrakul, the Promised End, so extra Tormod's Crypt denies graveyard card types that reduce Emrakul's cost and strips value from Icetill Explorer's graveyard-land plan. Unholy Heat answers Eldrazi Spawn tokens, and with our own graveyard growing it can scale to 6 damage against threats like Writhing Chrysalis or Herigast, Erupting Nullkite. Nature's Claim is a cheap answer to Utopia Sprawl-fueled mana acceleration or any problematic artifact/enchantment they land. We trim slow utility pieces for a mix of graveyard disruption and removal suited to this grindier green matchup.
Boros Energy is extremely fast and disruptive, with Ragavan, Nimble Pilferer applying early pressure and Thraben Charm/Blood Moon threatening our manabase and enchantments. Veil of Summer isn't a great fit here since it only grants hexproof from blue and black and only draws a card off a blue or black spell, neither of which this matchup provides, so we're leaving it home. Unholy Heat cheaply answers Ragavan, Ocelot Pride, and Guide of Souls before they snowball into card/energy advantage. We're not bringing in graveyard hate since they have no real graveyard plan, trimming Tormod's Crypt along with slower utility pieces that don't affect the race.
Affinity is entirely built around colorless artifact spells like Mox Opal and Mishra's Bauble, as well as triggered abilities like Weapons Manufacturing's token creation, making Consign to Memory extremely efficient at countering their colorless spells and shutting down their triggered abilities. Hurkyl's Recall can reset their whole board of artifacts back to hand, buying a full turn against their go-wide plan, without bouncing our own Mox Amber or Mox Opal since it only returns artifacts target player owns. We already run Tormod's Crypt maindeck, but since Urza's Saga Constructs scale off artifacts on the battlefield rather than the graveyard, we don't need more graveyard hate, and instead trim slow utility for pure interaction.