
TrampleTrampleExcess combat damage it deals to a blocker carries over to the player or planeswalker it's attacking.
ProwessProwessWhenever you cast a noncreature spell, this creature gets +1/+1 until end of turn. (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Power-upPower-upActivate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn. — : Iron Fist deals 5 damage divided as you choose among up to five targets. Put five +1/+1 counters on Iron Fist. (Activate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn.)
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.