In Leinore's case, you can draw a card at the beginning of your combat phase if you have three or more Creatures with different powers, and add a +1/+1 counter to one target creature
Red has enough impulse card draw these days that you probably dont need it, though
Yes, this is the last new Making Magic of the year (kind ofI'll explain in a second)
Just dont could on it as your turn 5 play
This includes , and Ice Age/Alliances , Mirage/Visions/Weatherlight , Tempest/Stronghold/Exodus , Urza's Saga/Urza's Legacy/Urza's Destiny , Mercadian Masques/Nemesis/Prophecy , Invasion/Planeshift/Apocalypse , Odyssey/Torment/Judgment , Onslaught/Legions/Scourge Mirrodin/Darksteel/Fifth Dawn and does not include base sets or pre-Ice Age sets
More notably, however, are the trainer cards and supportive Pokmon abilities that will be leaving Standard