Taking a random one-drop wont stop them from casting two more, and they have enough game-winners that discarding those is rough even when the spent mana doesnt just mean you lose to 1/1 beatdown
If youre new to JPN rarities altogether, the Japanese Pokemon card rarities explained guide covers the full rarity system this page assumes youre already past that and ready to chase SAR specifically
Card Name The Earth Crystal Mana Cost Type Legendary Artifact Rarity Rare rules Text Green spells you cast cost less to cast.If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on that creature instead., : Distribute two +1/+1 counters among one or two target creatures you control
The most precious one is an EX Mana Vault and after that we got: Braingeyser - PL Sol Ring - PL Serra Angel - PL, LP Forcefield - PO Lightning Bolt - PO Ice Storm - LP, GD Arabian Nights, Antiquities and Legends From Arabian Nights we got two Library of Alexandria (PL) and two Drop of Honey (GD)
So, what exactly is Jumpstart