For the most part, these sieges basically replace themselves when they enter the battlefield, either by putting a new card in the players hand or creating an extra permanent in play
Toxicrene There are so many very good lands in Commander for Toxicrene to turn off that it will never want for utility
Nissa of Shadowed Boughs Even if you cant exploit Nissa of Shadowed Boughs turning your lands into creatures, you get a planeswalker that ramps you and reanimates creatures
Beast Relentless Beast Relentless is a 6-cost Emerald card with 4 Strength, 5 Willpower, and 2 Lore
Card Name Mana Cost Type Legendary Artifact Equipment Rarity Rare rules Text As long as equipped creature is attacking, it has first strike and must be blocked if able.Equipped creature has "If a creature dying causes a triggered ability of this creature or an emblem you own to trigger, that ability triggers an additional time."Equip Number 353 Language English Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (6/6/2025) The granted ability affects the equipped creature's own "when this creature dies" triggered abilities as well as other triggered abilities of that creature or emblems you own that trigger when a creature dies
The Earth Crystal There are a lot of +1/+1 counters matter decks out there, and almost every single one will want The Earth Crystal