Dramatic entrance is similar to Through the Breach in that it's an instant speed creature cheat. Recently I have been trying to figure out a home for this card and Nahiri, the Harbinger seems decent with it. These two cards are relatively synergistic because the two cards that Dramatic entrance wants (worldspine wurm and progenitus) can be binned by Nahiri's plus ability.
Other cards that are worth considering for Dramatic entrance:
Other cards that are worth considering for Dramatic entrance:
-Primeval Titan
-Terastodon
-Summoner's Pact
-Fauna Shaman
-Evolutionary Leap
Decks I'm playing in Modern right now:
URB Grixis Reveler (http://www.mtgvault.com/supast4r7/decks/modern-grixis-reveler/)
UB Faeries (http://www.mtgvault.com/supast4r7/decks/ub-fae-2/)
UW Azorious Control (http://www.mtgvault.com/supast4r7/decks/modern-ojutai-control-2/)