Ironclad

Pay X life: this creature get +X/+X were X is
half of the payed life roundet down.

At the end of combat on your turn, gain 3
Life. Gain 5 life insted if Ironclad is monstrous.

{4}: Monstrosity 1 (If this permanent isn't monstrous, put a +1/+1 counter on it and it becomes monstrous.)