Sentinel

Artifact Creature - Shapeshifter 1/1, 4 (4)
{0}: Sentinel's toughness becomes 1 plus the power of target creature blocking or blocked by Sentinel. (This effect lasts indefinitely.)¹
Illus. Randy Asplund-Faith

Gatherer Card Rulings [Nov 2009]

• 10/1/2009: You apply power/toughness changing effects in a series of sublayers in the following order: (a) effects from characteristic-defining abilities; (b) effects that set power and/or toughness to a specific number or value; (c) effects that modify power and/or toughness but don't set power and/or toughness to a specific number or value; (d) changes from counters; (e) effects that switch a creature's power and toughness. This card's effect is always applied in (b), which means that effects applied in sublayer (c), (d), or (e) will not be overwritten; they will be applied to the new value.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (2/3)	Chronicles (Rare) Legends (Rare)