Magmasaur

Creature - Elemental Lizard 0/0, 3RR (5)
Magmasaur comes into play with five +1/+1 counters on it.
At the beginning of your upkeep, sacrifice Magmasaur unless you remove a +1/+1 counter from it. If you sacrifice Magmasaur this way, it deals damage equal to the number of +1/+1 counters on it to each creature without flying and each player.¹
Illus. Daniel Gelon

Crystal Keep Rulings Summaries

• Note - This card was creature type "Elemental" until Oracle 2008/01/01, when it became "Elemental Lizard".

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Tempest (Rare)