Make a huge Spawn/Scion army quickly, double up on enters-the-battlefield effects, and if you really want to be public enemy number one, copy annihilator triggers
How to build a mana curve If you haven't already picked some out, now is the time to start adding cards to your deck
It's often a stronger option than temporary removal like Unsummon effects, but players must be prepared for the manifested card
Rather than combo decks having to rely on something like Laboratory Maniac, which was easier for the opponent to disrupt, Oracle winning the game when it enters the battlefield means that even if the Oracle dies in response, its too late
The Impossible 10/10 For some cards, it is literally impossible to find a perfect 10 , since they always have a small misprint on them
A monocolor or colorless deck would be wise to choose a different character, but a deck using two or more colors would be behooved by the mana fixing that Mirri provides