[sblock=Janus]
The columns don't fill their squares, just turn them into difficult terrain (they're actually 4 foot high statues). Since forced movement ignores difficult terrain your Thunderwave will push him right back into that square.
If it actually had been a wall or a pillar that fills the whole square, you could have done that though.
[/sblock]
[sblock=Larinza]
ID1 is now at I10.
Every square aroud you is difficult terrain, so I'm afraid you can't shift unless you have an ability that lets you shift 2 or more.
[/sblock]
[sblock=Status Update]
Balth's attack shouldn't have done HQ damage, so ID3 has only taken 19 damage.
Janus's attack pushed ID1 into I10, on top of a statue.
H9 and I9 are no longer difficult terrain since Janus's turn has ended.
Larinza's turn!
23 - Balth (
22/22 hp, dazed (save ends))
23 - Murphy (
17/26 hp, cursed Iron Defender 1 and Iron Defender 4, concealed until end of next turn)
22 - Clay Scout at J14 (38 damage)
22 - Iron Defender 1 at J9 (
11 damage, marked by Shorrin)
19 - Iron Defender 2 at L8 (
10 damage, marked by Shorrin)
16 - Iron Defender 3 at J8 (
19 damage, marked by Shorrin)
13 - Janus (
14/22 hp, +3 to attack and damage on next attack vs Iron Defender 3, expires at end of Larinza's turn)
8 - Iron Defender 4 at M6 (
14 damage, can't see Murphy until start of Murphy's next turn)
6 - Larinza (
24/24 hp, +2 Init to all allies in LOS within 10 squares, allies in LOS who spend an action point regain 4 hp)
4 - Shorrin (
29/33 hp)
[/sblock]