Schmelzsteinraupe

Für die Schmelzsteinraupe gilt die Einsatzverzögerung nicht.
0: +1/-1 bis zum Ende des Zuges.

Diablo de Piedra Variable

Monstruosité de fluipierre

Mutaroccia Infernale

流動石の乱暴者

Fera Avernal de Rochafluente

Flowstone Hellion

Haste
{0}: Flowstone Hellion gets +1/-1 until end of turn.

The List

Vintage Masters

Stronghold

Flowstone Hellion is unaffected by summoning sickness.
o0: Flowstone Hellion gets +1/-1 until end of turn.

It will be put into its owner’s graveyard as soon as one of its abilities resolves that puts its toughness at zero (or less than the current amount of damage on it). This is a state-based action, so there is no way to activate its ability any more to increase its power further before it is put into the graveyard.