Combos:
1. Requires genex undine in hand without genex controller
Normal summon undine, undine effect, send crystron rosenix add genex controller. Crystron rosenix effect, banish itself to summon a crystron token. LInk summon link spider. Link spider effect, special summon controller from the hand. Use link spider and controller to link summon halq. Halq effect, special summon any tuner other than crystron rion. On your opponent's turn, you can make any synchro in the extra deck except deep beyond, which you can make with a different combo.
2. Requires Paces and Eanoc. Needs your opponent to control a card. You can use the most distant, deepest depths to search one of these two if you have a fish in hand.
Normal summon paces, paces effect, banish itself summon Eanoc. Eanoc effect summon paces. Synchro summon Askaan, The bicorned Ghoti. Askaan effect banish itself and your opponent's card. Askaan effect, banish paces from the grave ss itself. On your opponent's turn, activate paces effect, special summon paces. When your opponent has built a large board, activate paces effect to synchro summon ghoti of the deep beyond and banish the entire field. During your next standby phase, you have a reasonably sized beatstick.