Because I Have Willed It (Schemes) [Archenemy: Nicol Bolas Schemes] Squirrel Beast thinking the entrance was too

thinking the entrance was too narrow for it to follow

Set: HeartGold & SoulSilver: Call of Legends Type: Water Rarity: Ultra Rare Retreat cost: Colorless

Set: Diamond & Pearl: Secret Wonders Type: Fighting Rarity: Common Retreat cost: Colorless

Set: Kaldheim Commander Type: Land Rarity: Common Meandering River enters the battlefield tapped

In the late stages of a Tyranid invasion

Because I Have Willed It (Schemes) [Archenemy: Nicol Bolas Schemes] Squirrel Beast thinking the entrance was tooSet: Archenemy: Nicol Bolas Schemes Type: Ongoing Scheme Rarity: Common (An ongoing scheme remains face up until it's abandoned.) Spells you cast cost {1} less to cast. At the beginning of your opponents' end step, if they cast four or more spells this turn, abandon this scheme.