Molten Tigrex

Flash, Haste
When Molten Tigrex enters the battlefield,
Devour target and put X +1/+1 counters on it
where X is the toughness of that target. (Remove
a counter from Molten Tigrex each time it enters
combat, if it has no counters activate Tantrum.)
Tantrum (Target dealt damage by Molten Tigrex
recive a explosive powder counter, if that target again recives damage from Molten Tigrex, it is dealt 3 additional damage.)