As long as you control another white creature, Mavisa's Familar has lifelink. The same is true for blue and flying, black and deathtouch, and red and trample.
Reach (This creature can block creatures with flying.) Whenever Lifespinner Spider blocks or becomes blocked by a creature with flying, you gain 1 life.
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) When Kalime Charger enters, you may have another target creature you control gain trample until end of turn.
Look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.