That's all for this time
The TARDIS card - which was shown off in both its normal appearance and the new TARDIS Showcase frame treatment - has flying (of course - youll need to provide your own noises as it takes off though), Crew 2 - allowing creatures with a total value of at least two to be tapped to make it an artifact creature for the rest of the turn - and the ability to cascade the next spell cast and planeswalk when it attacks (with 2/4) if the player also controls a Time Lord
Look at all the great mid-game cards this deck has
Taking into account the rulings on Summon Limit (the card with the closest effect to this one, as far as I know), which does count the Summons already performed during the turn and before the Trap Card was activated, plus considering that this card specifically applies after the third Summon of the turn and apparently disregarding if this card was present or not during the previous Summons (as in, this card being activated after the second summon of the turn won't change the fact that said Summon was still the second one of the turn, if that makes sense), then yes, this card should also count the previous Summons, unless Konami drops a BKSS/exception ruling
Normal Deck 6.2 16 [22529] JP166 Arsenal Summoner Effect Monster Flip Monster - 4 Spellcaster 1600 1600 FLIP: Add 1 "Guardian" card from your Deck to your hand, except "Celtic Guardian", "Winged Dragon, Guardian of the Fortress #1", "Winged Dragon, Guardian of the Fortress #2", "Guardian of the Labyrinth", or "The Reliable Guardian"
Preventing any non-Eye creature from attacking, both of these cards are oddly perfect for us